5dec_5ac7
Your lab partner is trying again (eye roll).
Scenario: One-sample mean test (baby weights)
Joe's Hospital of Fried Foods claims their newborns are heavier than the national average.
The national average birth weight is 7.5 lbs.
Research question: Is the mean higher than 7.5 lbs?
They wrote the hypotheses below:
H0: μhospital (mu_hospital) > 7.5
In words: The hospital mean birth weight is greater than 7.5 lbs.
HA: μhospital (mu_hospital) = 7.5
In words: The hospital mean birth weight equals 7.5 lbs.
What is the main problem with their hypotheses?
They wrote the null hypothesis as an inequality (the null should include equality). Incorrect They swapped the null and alternative hypotheses. Correct They used sample statistics (like x̄ or s2) instead of population parameters. Incorrect Nothing is wrong; the hypotheses are stated correctly. Incorrect MCd8bb_ebe5
Your lab partner is trying again (eye roll).
Scenario: Two-sample mean test (Shannon diversity 2014 vs 2024)
Ecologists compare Shannon Diversity Index measurements taken at the same set of sites in 2014 and 2024.
Research question: Is the 2024 value larger than the 2014 value?
They wrote the hypotheses below:
H0: μ2024 (mu_2024) > μ2014 (mu_2014)
In words: The mean Shannon Diversity Index value in 2024 is greater than the value in 2014.
HA: μ2024 (mu_2024) ≤ μ2014 (mu_2014)
In words: The mean Shannon Diversity Index value in 2024 is less than or equal to the value in 2014.
What is the main problem with their hypotheses?
They swapped the null and alternative hypotheses. Incorrect They used sample statistics (like x̄ or s2) instead of population parameters. Incorrect They wrote the null hypothesis as an inequality (the null should include equality). Correct Nothing is wrong; the hypotheses are stated correctly. Incorrect MC9e8e_215b
Your lab partner is trying again (eye roll).
Scenario: One-sample mean test (baby weights)
Joe's Hospital of Fried Foods claims their newborns are heavier than the national average.
The national average birth weight is 7.5 lbs.
Research question: Is the mean different from 7.5 lbs?
They wrote the hypotheses below:
H0: μhospital (mu_hospital) ≠ 7.5
In words: The hospital mean birth weight is different from 7.5 lbs.
HA: μhospital (mu_hospital) = 7.5
In words: The hospital mean birth weight equals 7.5 lbs.
What is the main problem with their hypotheses?
Nothing is wrong; the hypotheses are stated correctly. Incorrect They used sample statistics (like x̄ or s2) instead of population parameters. Incorrect They wrote the null hypothesis as an inequality (the null should include equality). Correct They swapped the null and alternative hypotheses. Incorrect MC4bda_215b
Your lab partner is trying again (eye roll).
Scenario: Two-sample mean test (Shannon diversity 2014 vs 2024)
Ecologists compare Shannon Diversity Index measurements taken at the same set of sites in 2014 and 2024.
Research question: Are the 2014 and 2024 values different?
They wrote the hypotheses below:
H0: x̄2014 (xbar_2014) = x̄2024 (xbar_2024)
In words: The mean Shannon Diversity Index values in 2014 and 2024 are equal.
HA: x̄2014 (xbar_2014) ≠ x̄2024 (xbar_2024)
In words: The mean Shannon Diversity Index values in 2014 and 2024 are different.
What is the main problem with their hypotheses?
Nothing is wrong; the hypotheses are stated correctly. Incorrect They used sample statistics (like x̄ or s2) instead of population parameters. Correct They wrote the null hypothesis as an inequality (the null should include equality). Incorrect They swapped the null and alternative hypotheses. Incorrect MC621d_f8be
Your lab partner is trying again (eye roll).
Scenario: Two-sample mean test (Shannon diversity 2014 vs 2024)
Ecologists compare Shannon Diversity Index measurements taken at the same set of sites in 2014 and 2024.
Research question: Are the 2014 and 2024 values different?
They wrote the hypotheses below:
H0: μ2014 (mu_2014) = μ2024 (mu_2024)
In words: The mean Shannon Diversity Index values in 2014 and 2024 are equal.
HA: μ2014 (mu_2014) ≠ μ2024 (mu_2024)
In words: The mean Shannon Diversity Index values in 2014 and 2024 are different.
What is the main problem with their hypotheses?
Nothing is wrong; the hypotheses are stated correctly. Correct They wrote the null hypothesis as an inequality (the null should include equality). Incorrect They used sample statistics (like x̄ or s2) instead of population parameters. Incorrect They swapped the null and alternative hypotheses. Incorrect MC3c5c_5800
Your lab partner is trying again (eye roll).
Scenario: Two-sample variance test (F test)
Ecologists want to know whether the variability of Shannon Diversity Index measurements changed between 2014 and 2024.
Research question: Is the 2024 value larger than the 2014 value?
They wrote the hypotheses below:
H0: σ20242 (sigma^2_2024) > σ20142 (sigma^2_2014)
In words: The variance Shannon Diversity Index value in 2024 is greater than the value in 2014.
HA: σ20242 (sigma^2_2024) ≤ σ20142 (sigma^2_2014)
In words: The variance Shannon Diversity Index value in 2024 is less than or equal to the value in 2014.
What is the main problem with their hypotheses?
Nothing is wrong; the hypotheses are stated correctly. Incorrect They used sample statistics (like x̄ or s2) instead of population parameters. Incorrect They swapped the null and alternative hypotheses. Incorrect They wrote the null hypothesis as an inequality (the null should include equality). Correct MC9e8e_ab9c
Your lab partner is trying again (eye roll).
Scenario: One-sample mean test (baby weights)
Joe's Hospital of Fried Foods claims their newborns are heavier than the national average.
The national average birth weight is 7.5 lbs.
Research question: Is the mean different from 7.5 lbs?
They wrote the hypotheses below:
H0: μhospital (mu_hospital) ≠ 7.5
In words: The hospital mean birth weight is different from 7.5 lbs.
HA: μhospital (mu_hospital) = 7.5
In words: The hospital mean birth weight equals 7.5 lbs.
What is the main problem with their hypotheses?
They wrote the null hypothesis as an inequality (the null should include equality). Correct They swapped the null and alternative hypotheses. Incorrect Nothing is wrong; the hypotheses are stated correctly. Incorrect They used sample statistics (like x̄ or s2) instead of population parameters. Incorrect MC9e8e_73cc
Your lab partner is trying again (eye roll).
Scenario: One-sample mean test (baby weights)
Joe's Hospital of Fried Foods claims their newborns are heavier than the national average.
The national average birth weight is 7.5 lbs.
Research question: Is the mean different from 7.5 lbs?
They wrote the hypotheses below:
H0: μhospital (mu_hospital) ≠ 7.5
In words: The hospital mean birth weight is different from 7.5 lbs.
HA: μhospital (mu_hospital) = 7.5
In words: The hospital mean birth weight equals 7.5 lbs.
What is the main problem with their hypotheses?
They swapped the null and alternative hypotheses. Incorrect They used sample statistics (like x̄ or s2) instead of population parameters. Incorrect Nothing is wrong; the hypotheses are stated correctly. Incorrect They wrote the null hypothesis as an inequality (the null should include equality). Correct MC5ff2_f8be
Your lab partner is trying again (eye roll).
Scenario: Two-sample variance test (F test)
Ecologists want to know whether the variability of Shannon Diversity Index measurements changed between 2014 and 2024.
Research question: Are the 2014 and 2024 values different?
They wrote the hypotheses below:
H0: σ20142 (sigma^2_2014) ≠ σ20242 (sigma^2_2024)
In words: The variance Shannon Diversity Index values in 2014 and 2024 are different.
HA: σ20142 (sigma^2_2014) = σ20242 (sigma^2_2024)
In words: The variance Shannon Diversity Index values in 2014 and 2024 are equal.
What is the main problem with their hypotheses?
Nothing is wrong; the hypotheses are stated correctly. Incorrect They wrote the null hypothesis as an inequality (the null should include equality). Correct They used sample statistics (like x̄ or s2) instead of population parameters. Incorrect They swapped the null and alternative hypotheses. Incorrect MC7342_6058
Your lab partner is trying again (eye roll).
Scenario: Two-sample mean test (Shannon diversity 2014 vs 2024)
Ecologists compare Shannon Diversity Index measurements taken at the same set of sites in 2014 and 2024.
Research question: Is the 2024 value larger than the 2014 value?
They wrote the hypotheses below:
H0: x̄2014 (xbar_2014) = x̄2024 (xbar_2024)
In words: The mean Shannon Diversity Index values in 2014 and 2024 are equal.
HA: x̄2024 (xbar_2024) > x̄2014 (xbar_2014)
In words: The mean Shannon Diversity Index value in 2024 is greater than the value in 2014.
What is the main problem with their hypotheses?
They used sample statistics (like x̄ or s2) instead of population parameters. Correct They wrote the null hypothesis as an inequality (the null should include equality). Incorrect Nothing is wrong; the hypotheses are stated correctly. Incorrect They swapped the null and alternative hypotheses. Incorrect MC373a_5ac7
Your lab partner is trying again (eye roll).
Scenario: Two-sample variance test (F test)
Ecologists want to know whether the variability of Shannon Diversity Index measurements changed between 2014 and 2024.
Research question: Is the 2024 value smaller than the 2014 value?
They wrote the hypotheses below:
H0: s20142 (s2_2014) = s20242 (s2_2024)
In words: The variance Shannon Diversity Index values in 2014 and 2024 are equal.
HA: s20242 (s2_2024) < s20142 (s2_2014)
In words: The variance Shannon Diversity Index value in 2024 is less than the value in 2014.
What is the main problem with their hypotheses?
They wrote the null hypothesis as an inequality (the null should include equality). Incorrect They swapped the null and alternative hypotheses. Incorrect They used sample statistics (like x̄ or s2) instead of population parameters. Correct Nothing is wrong; the hypotheses are stated correctly. Incorrect MC9df1_452d
Your lab partner is trying again (eye roll).
Scenario: ANOVA (five years of Shannon diversity)
Ecologists measure Shannon Diversity Index at the same set of sites across five years (1994, 2004, 2009, 2014, 2024).
Research question: Are any of the group means different?
They wrote the hypotheses below:
H0: All group means are equal.
In words: All group means are equal.
HA: At least one group mean is different.
In words: At least one group mean is different.
What is the main problem with their hypotheses?
Nothing is wrong; the hypotheses are stated correctly. Correct They swapped the null and alternative hypotheses. Incorrect They used sample statistics (like x̄ or s2) instead of population parameters. Incorrect They wrote the null hypothesis as an inequality (the null should include equality). Incorrect MC2f08_215b
Your lab partner is trying again (eye roll).
Scenario: ANOVA (five years of Shannon diversity)
Ecologists measure Shannon Diversity Index at the same set of sites across five years (1994, 2004, 2009, 2014, 2024).
Research question: Are any of the group means different?
They wrote the hypotheses below:
H0: At least one group mean is different.
In words: At least one group mean is different.
HA: All group means are equal.
In words: All group means are equal.
What is the main problem with their hypotheses?
Nothing is wrong; the hypotheses are stated correctly. Incorrect They used sample statistics (like x̄ or s2) instead of population parameters. Incorrect They wrote the null hypothesis as an inequality (the null should include equality). Incorrect They swapped the null and alternative hypotheses. Correct MCab50_2713
Your lab partner is trying again (eye roll).
Scenario: Two-sample variance test (F test)
Ecologists want to know whether the variability of Shannon Diversity Index measurements changed between 2014 and 2024.
Research question: Is the 2024 value larger than the 2014 value?
They wrote the hypotheses below:
H0: σ20242 (sigma^2_2024) > σ20142 (sigma^2_2014)
In words: The variance Shannon Diversity Index value in 2024 is greater than the value in 2014.
HA: σ20142 (sigma^2_2014) = σ20242 (sigma^2_2024)
In words: The variance Shannon Diversity Index values in 2014 and 2024 are equal.
What is the main problem with their hypotheses?
They wrote the null hypothesis as an inequality (the null should include equality). Incorrect They used sample statistics (like x̄ or s2) instead of population parameters. Incorrect They swapped the null and alternative hypotheses. Correct Nothing is wrong; the hypotheses are stated correctly. Incorrect MC5a97_6058
Your lab partner is trying again (eye roll).
Scenario: Two-sample variance test (F test)
Ecologists want to know whether the variability of Shannon Diversity Index measurements changed between 2014 and 2024.
Research question: Is the 2024 value larger than the 2014 value?
They wrote the hypotheses below:
H0: s20142 (s2_2014) = s20242 (s2_2024)
In words: The variance Shannon Diversity Index values in 2014 and 2024 are equal.
HA: s20242 (s2_2024) > s20142 (s2_2014)
In words: The variance Shannon Diversity Index value in 2024 is greater than the value in 2014.
What is the main problem with their hypotheses?
They used sample statistics (like x̄ or s2) instead of population parameters. Correct They wrote the null hypothesis as an inequality (the null should include equality). Incorrect Nothing is wrong; the hypotheses are stated correctly. Incorrect They swapped the null and alternative hypotheses. Incorrect MC2f08_5800
Your lab partner is trying again (eye roll).
Scenario: ANOVA (five years of Shannon diversity)
Ecologists measure Shannon Diversity Index at the same set of sites across five years (1994, 2004, 2009, 2014, 2024).
Research question: Are any of the group means different?
They wrote the hypotheses below:
H0: At least one group mean is different.
In words: At least one group mean is different.
HA: All group means are equal.
In words: All group means are equal.
What is the main problem with their hypotheses?
Nothing is wrong; the hypotheses are stated correctly. Incorrect They used sample statistics (like x̄ or s2) instead of population parameters. Incorrect They swapped the null and alternative hypotheses. Correct They wrote the null hypothesis as an inequality (the null should include equality). Incorrect MCad0c_4cd4
Your lab partner is trying again (eye roll).
Scenario: Two-sample variance test (F test)
Ecologists want to know whether the variability of Shannon Diversity Index measurements changed between 2014 and 2024.
Research question: Is the 2024 value smaller than the 2014 value?
They wrote the hypotheses below:
H0: σ20142 (sigma^2_2014) = σ20242 (sigma^2_2024)
In words: The variance Shannon Diversity Index values in 2014 and 2024 are equal.
HA: σ20242 (sigma^2_2024) < σ20142 (sigma^2_2014)
In words: The variance Shannon Diversity Index value in 2024 is less than the value in 2014.
What is the main problem with their hypotheses?
They swapped the null and alternative hypotheses. Incorrect They wrote the null hypothesis as an inequality (the null should include equality). Incorrect They used sample statistics (like x̄ or s2) instead of population parameters. Incorrect Nothing is wrong; the hypotheses are stated correctly. Correct MC1c84_4cd4
Your lab partner is trying again (eye roll).
Scenario: One-sample mean test (baby weights)
Joe's Hospital of Fried Foods claims their newborns are heavier than the national average.
The national average birth weight is 7.5 lbs.
Research question: Is the mean higher than 7.5 lbs?
They wrote the hypotheses below:
H0: μhospital (mu_hospital) > 7.5
In words: The hospital mean birth weight is greater than 7.5 lbs.
HA: μhospital (mu_hospital) ≤ 7.5
In words: The hospital mean birth weight is less than or equal to 7.5 lbs.
What is the main problem with their hypotheses?
They swapped the null and alternative hypotheses. Incorrect They wrote the null hypothesis as an inequality (the null should include equality). Correct They used sample statistics (like x̄ or s2) instead of population parameters. Incorrect Nothing is wrong; the hypotheses are stated correctly. Incorrect MC9df1_bd8f
Your lab partner is trying again (eye roll).
Scenario: ANOVA (five years of Shannon diversity)
Ecologists measure Shannon Diversity Index at the same set of sites across five years (1994, 2004, 2009, 2014, 2024).
Research question: Are any of the group means different?
They wrote the hypotheses below:
H0: All group means are equal.
In words: All group means are equal.
HA: At least one group mean is different.
In words: At least one group mean is different.
What is the main problem with their hypotheses?
They swapped the null and alternative hypotheses. Incorrect They wrote the null hypothesis as an inequality (the null should include equality). Incorrect Nothing is wrong; the hypotheses are stated correctly. Correct They used sample statistics (like x̄ or s2) instead of population parameters. Incorrect MC9df1_cfa8
Your lab partner is trying again (eye roll).
Scenario: ANOVA (five years of Shannon diversity)
Ecologists measure Shannon Diversity Index at the same set of sites across five years (1994, 2004, 2009, 2014, 2024).
Research question: Are any of the group means different?
They wrote the hypotheses below:
H0: All group means are equal.
In words: All group means are equal.
HA: At least one group mean is different.
In words: At least one group mean is different.
What is the main problem with their hypotheses?
They wrote the null hypothesis as an inequality (the null should include equality). Incorrect They used sample statistics (like x̄ or s2) instead of population parameters. Incorrect Nothing is wrong; the hypotheses are stated correctly. Correct They swapped the null and alternative hypotheses. Incorrect MC5de4_73cc
Your lab partner is trying again (eye roll).
Scenario: Two-sample mean test (Shannon diversity 2014 vs 2024)
Ecologists compare Shannon Diversity Index measurements taken at the same set of sites in 2014 and 2024.
Research question: Is the 2024 value larger than the 2014 value?
They wrote the hypotheses below:
H0: μ2024 (mu_2024) > μ2014 (mu_2014)
In words: The mean Shannon Diversity Index value in 2024 is greater than the value in 2014.
HA: μ2014 (mu_2014) = μ2024 (mu_2024)
In words: The mean Shannon Diversity Index values in 2014 and 2024 are equal.
What is the main problem with their hypotheses?
They swapped the null and alternative hypotheses. Correct They used sample statistics (like x̄ or s2) instead of population parameters. Incorrect Nothing is wrong; the hypotheses are stated correctly. Incorrect They wrote the null hypothesis as an inequality (the null should include equality). Incorrect MC5a97_4cd4
Your lab partner is trying again (eye roll).
Scenario: Two-sample variance test (F test)
Ecologists want to know whether the variability of Shannon Diversity Index measurements changed between 2014 and 2024.
Research question: Is the 2024 value larger than the 2014 value?
They wrote the hypotheses below:
H0: s20142 (s2_2014) = s20242 (s2_2024)
In words: The variance Shannon Diversity Index values in 2014 and 2024 are equal.
HA: s20242 (s2_2024) > s20142 (s2_2014)
In words: The variance Shannon Diversity Index value in 2024 is greater than the value in 2014.
What is the main problem with their hypotheses?
They swapped the null and alternative hypotheses. Incorrect They wrote the null hypothesis as an inequality (the null should include equality). Incorrect They used sample statistics (like x̄ or s2) instead of population parameters. Correct Nothing is wrong; the hypotheses are stated correctly. Incorrect MC1b81_88e3
Your lab partner is trying again (eye roll).
Scenario: ANOVA (five years of Shannon diversity)
Ecologists measure Shannon Diversity Index at the same set of sites across five years (1994, 2004, 2009, 2014, 2024).
Research question: Are any of the group means different?
They wrote the hypotheses below:
H0: All sample means are equal.
In words: All sample means are equal.
HA: At least one sample mean is different.
In words: At least one sample mean is different.
What is the main problem with their hypotheses?
They used sample statistics (like x̄ or s2) instead of population parameters. Correct They wrote the null hypothesis as an inequality (the null should include equality). Incorrect They swapped the null and alternative hypotheses. Incorrect Nothing is wrong; the hypotheses are stated correctly. Incorrect MC9df1_a637
Your lab partner is trying again (eye roll).
Scenario: ANOVA (five years of Shannon diversity)
Ecologists measure Shannon Diversity Index at the same set of sites across five years (1994, 2004, 2009, 2014, 2024).
Research question: Are any of the group means different?
They wrote the hypotheses below:
H0: All group means are equal.
In words: All group means are equal.
HA: At least one group mean is different.
In words: At least one group mean is different.
What is the main problem with their hypotheses?
They used sample statistics (like x̄ or s2) instead of population parameters. Incorrect Nothing is wrong; the hypotheses are stated correctly. Correct They wrote the null hypothesis as an inequality (the null should include equality). Incorrect They swapped the null and alternative hypotheses. Incorrect MC9df1_df6c
Your lab partner is trying again (eye roll).
Scenario: ANOVA (five years of Shannon diversity)
Ecologists measure Shannon Diversity Index at the same set of sites across five years (1994, 2004, 2009, 2014, 2024).
Research question: Are any of the group means different?
They wrote the hypotheses below:
H0: All group means are equal.
In words: All group means are equal.
HA: At least one group mean is different.
In words: At least one group mean is different.
What is the main problem with their hypotheses?
They used sample statistics (like x̄ or s2) instead of population parameters. Incorrect Nothing is wrong; the hypotheses are stated correctly. Correct They swapped the null and alternative hypotheses. Incorrect They wrote the null hypothesis as an inequality (the null should include equality). Incorrect MCedb5_4294
Your lab partner is trying again (eye roll).
Scenario: Two-sample mean test (Shannon diversity 2014 vs 2024)
Ecologists compare Shannon Diversity Index measurements taken at the same set of sites in 2014 and 2024.
Research question: Is the 2024 value larger than the 2014 value?
They wrote the hypotheses below:
H0: μ2014 (mu_2014) = μ2024 (mu_2024)
In words: The mean Shannon Diversity Index values in 2014 and 2024 are equal.
HA: μ2024 (mu_2024) > μ2014 (mu_2014)
In words: The mean Shannon Diversity Index value in 2024 is greater than the value in 2014.
What is the main problem with their hypotheses?
Nothing is wrong; the hypotheses are stated correctly. Correct They swapped the null and alternative hypotheses. Incorrect They wrote the null hypothesis as an inequality (the null should include equality). Incorrect They used sample statistics (like x̄ or s2) instead of population parameters. Incorrect MC4a0c_df6c
Your lab partner is trying again (eye roll).
Scenario: Two-sample mean test (Shannon diversity 2014 vs 2024)
Ecologists compare Shannon Diversity Index measurements taken at the same set of sites in 2014 and 2024.
Research question: Is the 2024 value smaller than the 2014 value?
They wrote the hypotheses below:
H0: μ2014 (mu_2014) = μ2024 (mu_2024)
In words: The mean Shannon Diversity Index values in 2014 and 2024 are equal.
HA: μ2024 (mu_2024) < μ2014 (mu_2014)
In words: The mean Shannon Diversity Index value in 2024 is less than the value in 2014.
What is the main problem with their hypotheses?
They used sample statistics (like x̄ or s2) instead of population parameters. Incorrect Nothing is wrong; the hypotheses are stated correctly. Correct They swapped the null and alternative hypotheses. Incorrect They wrote the null hypothesis as an inequality (the null should include equality). Incorrect MC373a_452d
Your lab partner is trying again (eye roll).
Scenario: Two-sample variance test (F test)
Ecologists want to know whether the variability of Shannon Diversity Index measurements changed between 2014 and 2024.
Research question: Is the 2024 value smaller than the 2014 value?
They wrote the hypotheses below:
H0: s20142 (s2_2014) = s20242 (s2_2024)
In words: The variance Shannon Diversity Index values in 2014 and 2024 are equal.
HA: s20242 (s2_2024) < s20142 (s2_2014)
In words: The variance Shannon Diversity Index value in 2024 is less than the value in 2014.
What is the main problem with their hypotheses?
Nothing is wrong; the hypotheses are stated correctly. Incorrect They swapped the null and alternative hypotheses. Incorrect They used sample statistics (like x̄ or s2) instead of population parameters. Correct They wrote the null hypothesis as an inequality (the null should include equality). Incorrect MC1b81_4cd4
Your lab partner is trying again (eye roll).
Scenario: ANOVA (five years of Shannon diversity)
Ecologists measure Shannon Diversity Index at the same set of sites across five years (1994, 2004, 2009, 2014, 2024).
Research question: Are any of the group means different?
They wrote the hypotheses below:
H0: All sample means are equal.
In words: All sample means are equal.
HA: At least one sample mean is different.
In words: At least one sample mean is different.
What is the main problem with their hypotheses?
They swapped the null and alternative hypotheses. Incorrect They wrote the null hypothesis as an inequality (the null should include equality). Incorrect They used sample statistics (like x̄ or s2) instead of population parameters. Correct Nothing is wrong; the hypotheses are stated correctly. Incorrect MC2f08_edf2
Your lab partner is trying again (eye roll).
Scenario: ANOVA (five years of Shannon diversity)
Ecologists measure Shannon Diversity Index at the same set of sites across five years (1994, 2004, 2009, 2014, 2024).
Research question: Are any of the group means different?
They wrote the hypotheses below:
H0: At least one group mean is different.
In words: At least one group mean is different.
HA: All group means are equal.
In words: All group means are equal.
What is the main problem with their hypotheses?
Nothing is wrong; the hypotheses are stated correctly. Incorrect They wrote the null hypothesis as an inequality (the null should include equality). Correct They swapped the null and alternative hypotheses. Incorrect They used sample statistics (like x̄ or s2) instead of population parameters. Incorrect MC7ca0_d028
Your lab partner is trying again (eye roll).
Scenario: One-sample mean test (baby weights)
Joe's Hospital of Fried Foods claims their newborns are heavier than the national average.
The national average birth weight is 7.5 lbs.
Research question: Is the mean different from 7.5 lbs?
They wrote the hypotheses below:
H0: x̄hospital (xbar_hospital) = 7.5
In words: The hospital mean birth weight equals 7.5 lbs.
HA: x̄hospital (xbar_hospital) ≠ 7.5
In words: The hospital mean birth weight is different from 7.5 lbs.
What is the main problem with their hypotheses?
They used sample statistics (like x̄ or s2) instead of population parameters. Correct They swapped the null and alternative hypotheses. Incorrect They wrote the null hypothesis as an inequality (the null should include equality). Incorrect Nothing is wrong; the hypotheses are stated correctly. Incorrect MC2f08_73cc
Your lab partner is trying again (eye roll).
Scenario: ANOVA (five years of Shannon diversity)
Ecologists measure Shannon Diversity Index at the same set of sites across five years (1994, 2004, 2009, 2014, 2024).
Research question: Are any of the group means different?
They wrote the hypotheses below:
H0: At least one group mean is different.
In words: At least one group mean is different.
HA: All group means are equal.
In words: All group means are equal.
What is the main problem with their hypotheses?
They swapped the null and alternative hypotheses. Incorrect They used sample statistics (like x̄ or s2) instead of population parameters. Incorrect Nothing is wrong; the hypotheses are stated correctly. Incorrect They wrote the null hypothesis as an inequality (the null should include equality). Correct MC5de4_749e
Your lab partner is trying again (eye roll).
Scenario: Two-sample mean test (Shannon diversity 2014 vs 2024)
Ecologists compare Shannon Diversity Index measurements taken at the same set of sites in 2014 and 2024.
Research question: Is the 2024 value larger than the 2014 value?
They wrote the hypotheses below:
H0: μ2024 (mu_2024) > μ2014 (mu_2014)
In words: The mean Shannon Diversity Index value in 2024 is greater than the value in 2014.
HA: μ2014 (mu_2014) = μ2024 (mu_2024)
In words: The mean Shannon Diversity Index values in 2014 and 2024 are equal.
What is the main problem with their hypotheses?
They wrote the null hypothesis as an inequality (the null should include equality). Incorrect Nothing is wrong; the hypotheses are stated correctly. Incorrect They used sample statistics (like x̄ or s2) instead of population parameters. Incorrect They swapped the null and alternative hypotheses. Correct MC9df1_73cc
Your lab partner is trying again (eye roll).
Scenario: ANOVA (five years of Shannon diversity)
Ecologists measure Shannon Diversity Index at the same set of sites across five years (1994, 2004, 2009, 2014, 2024).
Research question: Are any of the group means different?
They wrote the hypotheses below:
H0: All group means are equal.
In words: All group means are equal.
HA: At least one group mean is different.
In words: At least one group mean is different.
What is the main problem with their hypotheses?
They swapped the null and alternative hypotheses. Incorrect They used sample statistics (like x̄ or s2) instead of population parameters. Incorrect Nothing is wrong; the hypotheses are stated correctly. Correct They wrote the null hypothesis as an inequality (the null should include equality). Incorrect MC373a_749e
Your lab partner is trying again (eye roll).
Scenario: Two-sample variance test (F test)
Ecologists want to know whether the variability of Shannon Diversity Index measurements changed between 2014 and 2024.
Research question: Is the 2024 value smaller than the 2014 value?
They wrote the hypotheses below:
H0: s20142 (s2_2014) = s20242 (s2_2024)
In words: The variance Shannon Diversity Index values in 2014 and 2024 are equal.
HA: s20242 (s2_2024) < s20142 (s2_2014)
In words: The variance Shannon Diversity Index value in 2024 is less than the value in 2014.
What is the main problem with their hypotheses?
They wrote the null hypothesis as an inequality (the null should include equality). Incorrect Nothing is wrong; the hypotheses are stated correctly. Incorrect They used sample statistics (like x̄ or s2) instead of population parameters. Correct They swapped the null and alternative hypotheses. Incorrect MC4bda_4cd4
Your lab partner is trying again (eye roll).
Scenario: Two-sample mean test (Shannon diversity 2014 vs 2024)
Ecologists compare Shannon Diversity Index measurements taken at the same set of sites in 2014 and 2024.
Research question: Are the 2014 and 2024 values different?
They wrote the hypotheses below:
H0: x̄2014 (xbar_2014) = x̄2024 (xbar_2024)
In words: The mean Shannon Diversity Index values in 2014 and 2024 are equal.
HA: x̄2014 (xbar_2014) ≠ x̄2024 (xbar_2024)
In words: The mean Shannon Diversity Index values in 2014 and 2024 are different.
What is the main problem with their hypotheses?
They swapped the null and alternative hypotheses. Incorrect They wrote the null hypothesis as an inequality (the null should include equality). Incorrect They used sample statistics (like x̄ or s2) instead of population parameters. Correct Nothing is wrong; the hypotheses are stated correctly. Incorrect MC3e1c_4294
Your lab partner is trying again (eye roll).
Scenario: One-sample mean test (baby weights)
Joe's Hospital of Fried Foods claims their newborns are heavier than the national average.
The national average birth weight is 7.5 lbs.
Research question: Is the mean lower than 7.5 lbs?
They wrote the hypotheses below:
H0: μhospital (mu_hospital) < 7.5
In words: The hospital mean birth weight is less than 7.5 lbs.
HA: μhospital (mu_hospital) ≥ 7.5
In words: The hospital mean birth weight is greater than or equal to 7.5 lbs.
What is the main problem with their hypotheses?
Nothing is wrong; the hypotheses are stated correctly. Incorrect They swapped the null and alternative hypotheses. Incorrect They wrote the null hypothesis as an inequality (the null should include equality). Correct They used sample statistics (like x̄ or s2) instead of population parameters. Incorrect MC1c84_bd8f
Your lab partner is trying again (eye roll).
Scenario: One-sample mean test (baby weights)
Joe's Hospital of Fried Foods claims their newborns are heavier than the national average.
The national average birth weight is 7.5 lbs.
Research question: Is the mean higher than 7.5 lbs?
They wrote the hypotheses below:
H0: μhospital (mu_hospital) > 7.5
In words: The hospital mean birth weight is greater than 7.5 lbs.
HA: μhospital (mu_hospital) ≤ 7.5
In words: The hospital mean birth weight is less than or equal to 7.5 lbs.
What is the main problem with their hypotheses?
They swapped the null and alternative hypotheses. Incorrect They wrote the null hypothesis as an inequality (the null should include equality). Correct Nothing is wrong; the hypotheses are stated correctly. Incorrect They used sample statistics (like x̄ or s2) instead of population parameters. Incorrect MC2f08_2713
Your lab partner is trying again (eye roll).
Scenario: ANOVA (five years of Shannon diversity)
Ecologists measure Shannon Diversity Index at the same set of sites across five years (1994, 2004, 2009, 2014, 2024).
Research question: Are any of the group means different?
They wrote the hypotheses below:
H0: At least one group mean is different.
In words: At least one group mean is different.
HA: All group means are equal.
In words: All group means are equal.
What is the main problem with their hypotheses?
They wrote the null hypothesis as an inequality (the null should include equality). Incorrect They used sample statistics (like x̄ or s2) instead of population parameters. Incorrect They swapped the null and alternative hypotheses. Correct Nothing is wrong; the hypotheses are stated correctly. Incorrect MCbfcf_edf2
Your lab partner is trying again (eye roll).
Scenario: Two-sample variance test (F test)
Ecologists want to know whether the variability of Shannon Diversity Index measurements changed between 2014 and 2024.
Research question: Is the 2024 value smaller than the 2014 value?
They wrote the hypotheses below:
H0: σ20242 (sigma^2_2024) < σ20142 (sigma^2_2014)
In words: The variance Shannon Diversity Index value in 2024 is less than the value in 2014.
HA: σ20142 (sigma^2_2014) = σ20242 (sigma^2_2024)
In words: The variance Shannon Diversity Index values in 2014 and 2024 are equal.
What is the main problem with their hypotheses?
Nothing is wrong; the hypotheses are stated correctly. Incorrect They wrote the null hypothesis as an inequality (the null should include equality). Incorrect They swapped the null and alternative hypotheses. Correct They used sample statistics (like x̄ or s2) instead of population parameters. Incorrect MCad0c_a637
Your lab partner is trying again (eye roll).
Scenario: Two-sample variance test (F test)
Ecologists want to know whether the variability of Shannon Diversity Index measurements changed between 2014 and 2024.
Research question: Is the 2024 value smaller than the 2014 value?
They wrote the hypotheses below:
H0: σ20142 (sigma^2_2014) = σ20242 (sigma^2_2024)
In words: The variance Shannon Diversity Index values in 2014 and 2024 are equal.
HA: σ20242 (sigma^2_2024) < σ20142 (sigma^2_2014)
In words: The variance Shannon Diversity Index value in 2024 is less than the value in 2014.
What is the main problem with their hypotheses?
They used sample statistics (like x̄ or s2) instead of population parameters. Incorrect Nothing is wrong; the hypotheses are stated correctly. Correct They wrote the null hypothesis as an inequality (the null should include equality). Incorrect They swapped the null and alternative hypotheses. Incorrect MC7342_a637
Your lab partner is trying again (eye roll).
Scenario: Two-sample mean test (Shannon diversity 2014 vs 2024)
Ecologists compare Shannon Diversity Index measurements taken at the same set of sites in 2014 and 2024.
Research question: Is the 2024 value larger than the 2014 value?
They wrote the hypotheses below:
H0: x̄2014 (xbar_2014) = x̄2024 (xbar_2024)
In words: The mean Shannon Diversity Index values in 2014 and 2024 are equal.
HA: x̄2024 (xbar_2024) > x̄2014 (xbar_2014)
In words: The mean Shannon Diversity Index value in 2024 is greater than the value in 2014.
What is the main problem with their hypotheses?
They used sample statistics (like x̄ or s2) instead of population parameters. Correct Nothing is wrong; the hypotheses are stated correctly. Incorrect They wrote the null hypothesis as an inequality (the null should include equality). Incorrect They swapped the null and alternative hypotheses. Incorrect MC3c5c_df6c
Your lab partner is trying again (eye roll).
Scenario: Two-sample variance test (F test)
Ecologists want to know whether the variability of Shannon Diversity Index measurements changed between 2014 and 2024.
Research question: Is the 2024 value larger than the 2014 value?
They wrote the hypotheses below:
H0: σ20242 (sigma^2_2024) > σ20142 (sigma^2_2014)
In words: The variance Shannon Diversity Index value in 2024 is greater than the value in 2014.
HA: σ20242 (sigma^2_2024) ≤ σ20142 (sigma^2_2014)
In words: The variance Shannon Diversity Index value in 2024 is less than or equal to the value in 2014.
What is the main problem with their hypotheses?
They used sample statistics (like x̄ or s2) instead of population parameters. Incorrect Nothing is wrong; the hypotheses are stated correctly. Incorrect They swapped the null and alternative hypotheses. Incorrect They wrote the null hypothesis as an inequality (the null should include equality). Correct MC9e8e_f8be
Your lab partner is trying again (eye roll).
Scenario: One-sample mean test (baby weights)
Joe's Hospital of Fried Foods claims their newborns are heavier than the national average.
The national average birth weight is 7.5 lbs.
Research question: Is the mean different from 7.5 lbs?
They wrote the hypotheses below:
H0: μhospital (mu_hospital) ≠ 7.5
In words: The hospital mean birth weight is different from 7.5 lbs.
HA: μhospital (mu_hospital) = 7.5
In words: The hospital mean birth weight equals 7.5 lbs.
What is the main problem with their hypotheses?
Nothing is wrong; the hypotheses are stated correctly. Incorrect They wrote the null hypothesis as an inequality (the null should include equality). Correct They used sample statistics (like x̄ or s2) instead of population parameters. Incorrect They swapped the null and alternative hypotheses. Incorrect MC2f08_ebe5
Your lab partner is trying again (eye roll).
Scenario: ANOVA (five years of Shannon diversity)
Ecologists measure Shannon Diversity Index at the same set of sites across five years (1994, 2004, 2009, 2014, 2024).
Research question: Are any of the group means different?
They wrote the hypotheses below:
H0: At least one group mean is different.
In words: At least one group mean is different.
HA: All group means are equal.
In words: All group means are equal.
What is the main problem with their hypotheses?
They swapped the null and alternative hypotheses. Incorrect They used sample statistics (like x̄ or s2) instead of population parameters. Incorrect They wrote the null hypothesis as an inequality (the null should include equality). Correct Nothing is wrong; the hypotheses are stated correctly. Incorrect MCad0c_edf2
Your lab partner is trying again (eye roll).
Scenario: Two-sample variance test (F test)
Ecologists want to know whether the variability of Shannon Diversity Index measurements changed between 2014 and 2024.
Research question: Is the 2024 value smaller than the 2014 value?
They wrote the hypotheses below:
H0: σ20142 (sigma^2_2014) = σ20242 (sigma^2_2024)
In words: The variance Shannon Diversity Index values in 2014 and 2024 are equal.
HA: σ20242 (sigma^2_2024) < σ20142 (sigma^2_2014)
In words: The variance Shannon Diversity Index value in 2024 is less than the value in 2014.
What is the main problem with their hypotheses?
Nothing is wrong; the hypotheses are stated correctly. Correct They wrote the null hypothesis as an inequality (the null should include equality). Incorrect They swapped the null and alternative hypotheses. Incorrect They used sample statistics (like x̄ or s2) instead of population parameters. Incorrect MC9e8e_452d
Your lab partner is trying again (eye roll).
Scenario: One-sample mean test (baby weights)
Joe's Hospital of Fried Foods claims their newborns are heavier than the national average.
The national average birth weight is 7.5 lbs.
Research question: Is the mean different from 7.5 lbs?
They wrote the hypotheses below:
H0: μhospital (mu_hospital) ≠ 7.5
In words: The hospital mean birth weight is different from 7.5 lbs.
HA: μhospital (mu_hospital) = 7.5
In words: The hospital mean birth weight equals 7.5 lbs.
What is the main problem with their hypotheses?
Nothing is wrong; the hypotheses are stated correctly. Incorrect They swapped the null and alternative hypotheses. Correct They used sample statistics (like x̄ or s2) instead of population parameters. Incorrect They wrote the null hypothesis as an inequality (the null should include equality). Incorrect MC5ff2_6058
Your lab partner is trying again (eye roll).
Scenario: Two-sample variance test (F test)
Ecologists want to know whether the variability of Shannon Diversity Index measurements changed between 2014 and 2024.
Research question: Are the 2014 and 2024 values different?
They wrote the hypotheses below:
H0: σ20142 (sigma^2_2014) ≠ σ20242 (sigma^2_2024)
In words: The variance Shannon Diversity Index values in 2014 and 2024 are different.
HA: σ20142 (sigma^2_2014) = σ20242 (sigma^2_2024)
In words: The variance Shannon Diversity Index values in 2014 and 2024 are equal.
What is the main problem with their hypotheses?
They used sample statistics (like x̄ or s2) instead of population parameters. Incorrect They wrote the null hypothesis as an inequality (the null should include equality). Incorrect Nothing is wrong; the hypotheses are stated correctly. Incorrect They swapped the null and alternative hypotheses. Correct MC2f08_d665
Your lab partner is trying again (eye roll).
Scenario: ANOVA (five years of Shannon diversity)
Ecologists measure Shannon Diversity Index at the same set of sites across five years (1994, 2004, 2009, 2014, 2024).
Research question: Are any of the group means different?
They wrote the hypotheses below:
H0: At least one group mean is different.
In words: At least one group mean is different.
HA: All group means are equal.
In words: All group means are equal.
What is the main problem with their hypotheses?
They swapped the null and alternative hypotheses. Incorrect Nothing is wrong; the hypotheses are stated correctly. Incorrect They wrote the null hypothesis as an inequality (the null should include equality). Correct They used sample statistics (like x̄ or s2) instead of population parameters. Incorrect MC9df1_d1dc
Your lab partner is trying again (eye roll).
Scenario: ANOVA (five years of Shannon diversity)
Ecologists measure Shannon Diversity Index at the same set of sites across five years (1994, 2004, 2009, 2014, 2024).
Research question: Are any of the group means different?
They wrote the hypotheses below:
H0: All group means are equal.
In words: All group means are equal.
HA: At least one group mean is different.
In words: At least one group mean is different.
What is the main problem with their hypotheses?
They swapped the null and alternative hypotheses. Incorrect Nothing is wrong; the hypotheses are stated correctly. Correct They used sample statistics (like x̄ or s2) instead of population parameters. Incorrect They wrote the null hypothesis as an inequality (the null should include equality). Incorrect MC4cb3_edf2
Your lab partner is trying again (eye roll).
Scenario: One-sample mean test (baby weights)
Joe's Hospital of Fried Foods claims their newborns are heavier than the national average.
The national average birth weight is 7.5 lbs.
Research question: Is the mean lower than 7.5 lbs?
They wrote the hypotheses below:
H0: x̄hospital (xbar_hospital) = 7.5
In words: The hospital mean birth weight equals 7.5 lbs.
HA: x̄hospital (xbar_hospital) < 7.5
In words: The hospital mean birth weight is less than 7.5 lbs.
What is the main problem with their hypotheses?
Nothing is wrong; the hypotheses are stated correctly. Incorrect They wrote the null hypothesis as an inequality (the null should include equality). Incorrect They swapped the null and alternative hypotheses. Incorrect They used sample statistics (like x̄ or s2) instead of population parameters. Correct MC5ff2_5ac7
Your lab partner is trying again (eye roll).
Scenario: Two-sample variance test (F test)
Ecologists want to know whether the variability of Shannon Diversity Index measurements changed between 2014 and 2024.
Research question: Are the 2014 and 2024 values different?
They wrote the hypotheses below:
H0: σ20142 (sigma^2_2014) ≠ σ20242 (sigma^2_2024)
In words: The variance Shannon Diversity Index values in 2014 and 2024 are different.
HA: σ20142 (sigma^2_2014) = σ20242 (sigma^2_2024)
In words: The variance Shannon Diversity Index values in 2014 and 2024 are equal.
What is the main problem with their hypotheses?
They wrote the null hypothesis as an inequality (the null should include equality). Incorrect They swapped the null and alternative hypotheses. Correct They used sample statistics (like x̄ or s2) instead of population parameters. Incorrect Nothing is wrong; the hypotheses are stated correctly. Incorrect MC1ed2_d028
Your lab partner is trying again (eye roll).
Scenario: One-sample mean test (baby weights)
Joe's Hospital of Fried Foods claims their newborns are heavier than the national average.
The national average birth weight is 7.5 lbs.
Research question: Is the mean higher than 7.5 lbs?
They wrote the hypotheses below:
H0: μhospital (mu_hospital) = 7.5
In words: The hospital mean birth weight equals 7.5 lbs.
HA: μhospital (mu_hospital) > 7.5
In words: The hospital mean birth weight is greater than 7.5 lbs.
What is the main problem with their hypotheses?
They used sample statistics (like x̄ or s2) instead of population parameters. Incorrect They swapped the null and alternative hypotheses. Incorrect They wrote the null hypothesis as an inequality (the null should include equality). Incorrect Nothing is wrong; the hypotheses are stated correctly. Correct MC3c5c_749e
Your lab partner is trying again (eye roll).
Scenario: Two-sample variance test (F test)
Ecologists want to know whether the variability of Shannon Diversity Index measurements changed between 2014 and 2024.
Research question: Is the 2024 value larger than the 2014 value?
They wrote the hypotheses below:
H0: σ20242 (sigma^2_2024) > σ20142 (sigma^2_2014)
In words: The variance Shannon Diversity Index value in 2024 is greater than the value in 2014.
HA: σ20242 (sigma^2_2024) ≤ σ20142 (sigma^2_2014)
In words: The variance Shannon Diversity Index value in 2024 is less than or equal to the value in 2014.
What is the main problem with their hypotheses?
They wrote the null hypothesis as an inequality (the null should include equality). Correct Nothing is wrong; the hypotheses are stated correctly. Incorrect They used sample statistics (like x̄ or s2) instead of population parameters. Incorrect They swapped the null and alternative hypotheses. Incorrect MCde97_cfa8
Your lab partner is trying again (eye roll).
Scenario: Two-sample mean test (Shannon diversity 2014 vs 2024)
Ecologists compare Shannon Diversity Index measurements taken at the same set of sites in 2014 and 2024.
Research question: Are the 2014 and 2024 values different?
They wrote the hypotheses below:
H0: μ2014 (mu_2014) ≠ μ2024 (mu_2024)
In words: The mean Shannon Diversity Index values in 2014 and 2024 are different.
HA: μ2014 (mu_2014) = μ2024 (mu_2024)
In words: The mean Shannon Diversity Index values in 2014 and 2024 are equal.
What is the main problem with their hypotheses?
They wrote the null hypothesis as an inequality (the null should include equality). Correct They used sample statistics (like x̄ or s2) instead of population parameters. Incorrect Nothing is wrong; the hypotheses are stated correctly. Incorrect They swapped the null and alternative hypotheses. Incorrect MC41ba_df6c
Your lab partner is trying again (eye roll).
Scenario: Two-sample mean test (Shannon diversity 2014 vs 2024)
Ecologists compare Shannon Diversity Index measurements taken at the same set of sites in 2014 and 2024.
Research question: Is the 2024 value smaller than the 2014 value?
They wrote the hypotheses below:
H0: μ2024 (mu_2024) < μ2014 (mu_2014)
In words: The mean Shannon Diversity Index value in 2024 is less than the value in 2014.
HA: μ2014 (mu_2014) = μ2024 (mu_2024)
In words: The mean Shannon Diversity Index values in 2014 and 2024 are equal.
What is the main problem with their hypotheses?
They used sample statistics (like x̄ or s2) instead of population parameters. Incorrect Nothing is wrong; the hypotheses are stated correctly. Incorrect They swapped the null and alternative hypotheses. Correct They wrote the null hypothesis as an inequality (the null should include equality). Incorrect MCbfcf_cfa8
Your lab partner is trying again (eye roll).
Scenario: Two-sample variance test (F test)
Ecologists want to know whether the variability of Shannon Diversity Index measurements changed between 2014 and 2024.
Research question: Is the 2024 value smaller than the 2014 value?
They wrote the hypotheses below:
H0: σ20242 (sigma^2_2024) < σ20142 (sigma^2_2014)
In words: The variance Shannon Diversity Index value in 2024 is less than the value in 2014.
HA: σ20142 (sigma^2_2014) = σ20242 (sigma^2_2024)
In words: The variance Shannon Diversity Index values in 2014 and 2024 are equal.
What is the main problem with their hypotheses?
They wrote the null hypothesis as an inequality (the null should include equality). Incorrect They used sample statistics (like x̄ or s2) instead of population parameters. Incorrect Nothing is wrong; the hypotheses are stated correctly. Incorrect They swapped the null and alternative hypotheses. Correct MCd8bb_452d
Your lab partner is trying again (eye roll).
Scenario: Two-sample mean test (Shannon diversity 2014 vs 2024)
Ecologists compare Shannon Diversity Index measurements taken at the same set of sites in 2014 and 2024.
Research question: Is the 2024 value larger than the 2014 value?
They wrote the hypotheses below:
H0: μ2024 (mu_2024) > μ2014 (mu_2014)
In words: The mean Shannon Diversity Index value in 2024 is greater than the value in 2014.
HA: μ2024 (mu_2024) ≤ μ2014 (mu_2014)
In words: The mean Shannon Diversity Index value in 2024 is less than or equal to the value in 2014.
What is the main problem with their hypotheses?
Nothing is wrong; the hypotheses are stated correctly. Incorrect They swapped the null and alternative hypotheses. Incorrect They used sample statistics (like x̄ or s2) instead of population parameters. Incorrect They wrote the null hypothesis as an inequality (the null should include equality). Correct MCde97_6058
Your lab partner is trying again (eye roll).
Scenario: Two-sample mean test (Shannon diversity 2014 vs 2024)
Ecologists compare Shannon Diversity Index measurements taken at the same set of sites in 2014 and 2024.
Research question: Are the 2014 and 2024 values different?
They wrote the hypotheses below:
H0: μ2014 (mu_2014) ≠ μ2024 (mu_2024)
In words: The mean Shannon Diversity Index values in 2014 and 2024 are different.
HA: μ2014 (mu_2014) = μ2024 (mu_2024)
In words: The mean Shannon Diversity Index values in 2014 and 2024 are equal.
What is the main problem with their hypotheses?
They used sample statistics (like x̄ or s2) instead of population parameters. Incorrect They wrote the null hypothesis as an inequality (the null should include equality). Incorrect Nothing is wrong; the hypotheses are stated correctly. Incorrect They swapped the null and alternative hypotheses. Correct MC5a97_2713
Your lab partner is trying again (eye roll).
Scenario: Two-sample variance test (F test)
Ecologists want to know whether the variability of Shannon Diversity Index measurements changed between 2014 and 2024.
Research question: Is the 2024 value larger than the 2014 value?
They wrote the hypotheses below:
H0: s20142 (s2_2014) = s20242 (s2_2024)
In words: The variance Shannon Diversity Index values in 2014 and 2024 are equal.
HA: s20242 (s2_2024) > s20142 (s2_2014)
In words: The variance Shannon Diversity Index value in 2024 is greater than the value in 2014.
What is the main problem with their hypotheses?
They wrote the null hypothesis as an inequality (the null should include equality). Incorrect They used sample statistics (like x̄ or s2) instead of population parameters. Correct They swapped the null and alternative hypotheses. Incorrect Nothing is wrong; the hypotheses are stated correctly. Incorrect MC9e8e_5800
Your lab partner is trying again (eye roll).
Scenario: One-sample mean test (baby weights)
Joe's Hospital of Fried Foods claims their newborns are heavier than the national average.
The national average birth weight is 7.5 lbs.
Research question: Is the mean different from 7.5 lbs?
They wrote the hypotheses below:
H0: μhospital (mu_hospital) ≠ 7.5
In words: The hospital mean birth weight is different from 7.5 lbs.
HA: μhospital (mu_hospital) = 7.5
In words: The hospital mean birth weight equals 7.5 lbs.
What is the main problem with their hypotheses?
Nothing is wrong; the hypotheses are stated correctly. Incorrect They used sample statistics (like x̄ or s2) instead of population parameters. Incorrect They swapped the null and alternative hypotheses. Incorrect They wrote the null hypothesis as an inequality (the null should include equality). Correct MC1ed2_f8be
Your lab partner is trying again (eye roll).
Scenario: One-sample mean test (baby weights)
Joe's Hospital of Fried Foods claims their newborns are heavier than the national average.
The national average birth weight is 7.5 lbs.
Research question: Is the mean higher than 7.5 lbs?
They wrote the hypotheses below:
H0: μhospital (mu_hospital) = 7.5
In words: The hospital mean birth weight equals 7.5 lbs.
HA: μhospital (mu_hospital) > 7.5
In words: The hospital mean birth weight is greater than 7.5 lbs.
What is the main problem with their hypotheses?
Nothing is wrong; the hypotheses are stated correctly. Correct They wrote the null hypothesis as an inequality (the null should include equality). Incorrect They used sample statistics (like x̄ or s2) instead of population parameters. Incorrect They swapped the null and alternative hypotheses. Incorrect MC2f08_d1dc
Your lab partner is trying again (eye roll).
Scenario: ANOVA (five years of Shannon diversity)
Ecologists measure Shannon Diversity Index at the same set of sites across five years (1994, 2004, 2009, 2014, 2024).
Research question: Are any of the group means different?
They wrote the hypotheses below:
H0: At least one group mean is different.
In words: At least one group mean is different.
HA: All group means are equal.
In words: All group means are equal.
What is the main problem with their hypotheses?
They swapped the null and alternative hypotheses. Correct Nothing is wrong; the hypotheses are stated correctly. Incorrect They used sample statistics (like x̄ or s2) instead of population parameters. Incorrect They wrote the null hypothesis as an inequality (the null should include equality). Incorrect MCa6e0_6058
Your lab partner is trying again (eye roll).
Scenario: Two-sample mean test (Shannon diversity 2014 vs 2024)
Ecologists compare Shannon Diversity Index measurements taken at the same set of sites in 2014 and 2024.
Research question: Is the 2024 value smaller than the 2014 value?
They wrote the hypotheses below:
H0: μ2024 (mu_2024) < μ2014 (mu_2014)
In words: The mean Shannon Diversity Index value in 2024 is less than the value in 2014.
HA: μ2024 (mu_2024) ≥ μ2014 (mu_2014)
In words: The mean Shannon Diversity Index value in 2024 is greater than or equal to the value in 2014.
What is the main problem with their hypotheses?
They used sample statistics (like x̄ or s2) instead of population parameters. Incorrect They wrote the null hypothesis as an inequality (the null should include equality). Correct Nothing is wrong; the hypotheses are stated correctly. Incorrect They swapped the null and alternative hypotheses. Incorrect MCad0c_5800
Your lab partner is trying again (eye roll).
Scenario: Two-sample variance test (F test)
Ecologists want to know whether the variability of Shannon Diversity Index measurements changed between 2014 and 2024.
Research question: Is the 2024 value smaller than the 2014 value?
They wrote the hypotheses below:
H0: σ20142 (sigma^2_2014) = σ20242 (sigma^2_2024)
In words: The variance Shannon Diversity Index values in 2014 and 2024 are equal.
HA: σ20242 (sigma^2_2024) < σ20142 (sigma^2_2014)
In words: The variance Shannon Diversity Index value in 2024 is less than the value in 2014.
What is the main problem with their hypotheses?
Nothing is wrong; the hypotheses are stated correctly. Correct They used sample statistics (like x̄ or s2) instead of population parameters. Incorrect They swapped the null and alternative hypotheses. Incorrect They wrote the null hypothesis as an inequality (the null should include equality). Incorrect MCe071_749e
Your lab partner is trying again (eye roll).
Scenario: Two-sample variance test (F test)
Ecologists want to know whether the variability of Shannon Diversity Index measurements changed between 2014 and 2024.
Research question: Are the 2014 and 2024 values different?
They wrote the hypotheses below:
H0: s20142 (s2_2014) = s20242 (s2_2024)
In words: The variance Shannon Diversity Index values in 2014 and 2024 are equal.
HA: s20142 (s2_2014) ≠ s20242 (s2_2024)
In words: The variance Shannon Diversity Index values in 2014 and 2024 are different.
What is the main problem with their hypotheses?
They wrote the null hypothesis as an inequality (the null should include equality). Incorrect Nothing is wrong; the hypotheses are stated correctly. Incorrect They used sample statistics (like x̄ or s2) instead of population parameters. Correct They swapped the null and alternative hypotheses. Incorrect MC3e1c_749e
Your lab partner is trying again (eye roll).
Scenario: One-sample mean test (baby weights)
Joe's Hospital of Fried Foods claims their newborns are heavier than the national average.
The national average birth weight is 7.5 lbs.
Research question: Is the mean lower than 7.5 lbs?
They wrote the hypotheses below:
H0: μhospital (mu_hospital) < 7.5
In words: The hospital mean birth weight is less than 7.5 lbs.
HA: μhospital (mu_hospital) ≥ 7.5
In words: The hospital mean birth weight is greater than or equal to 7.5 lbs.
What is the main problem with their hypotheses?
They wrote the null hypothesis as an inequality (the null should include equality). Correct Nothing is wrong; the hypotheses are stated correctly. Incorrect They used sample statistics (like x̄ or s2) instead of population parameters. Incorrect They swapped the null and alternative hypotheses. Incorrect MC4bda_749e
Your lab partner is trying again (eye roll).
Scenario: Two-sample mean test (Shannon diversity 2014 vs 2024)
Ecologists compare Shannon Diversity Index measurements taken at the same set of sites in 2014 and 2024.
Research question: Are the 2014 and 2024 values different?
They wrote the hypotheses below:
H0: x̄2014 (xbar_2014) = x̄2024 (xbar_2024)
In words: The mean Shannon Diversity Index values in 2014 and 2024 are equal.
HA: x̄2014 (xbar_2014) ≠ x̄2024 (xbar_2024)
In words: The mean Shannon Diversity Index values in 2014 and 2024 are different.
What is the main problem with their hypotheses?
They wrote the null hypothesis as an inequality (the null should include equality). Incorrect Nothing is wrong; the hypotheses are stated correctly. Incorrect They used sample statistics (like x̄ or s2) instead of population parameters. Correct They swapped the null and alternative hypotheses. Incorrect MCe071_61d2
Your lab partner is trying again (eye roll).
Scenario: Two-sample variance test (F test)
Ecologists want to know whether the variability of Shannon Diversity Index measurements changed between 2014 and 2024.
Research question: Are the 2014 and 2024 values different?
They wrote the hypotheses below:
H0: s20142 (s2_2014) = s20242 (s2_2024)
In words: The variance Shannon Diversity Index values in 2014 and 2024 are equal.
HA: s20142 (s2_2014) ≠ s20242 (s2_2024)
In words: The variance Shannon Diversity Index values in 2014 and 2024 are different.
What is the main problem with their hypotheses?
They wrote the null hypothesis as an inequality (the null should include equality). Incorrect Nothing is wrong; the hypotheses are stated correctly. Incorrect They swapped the null and alternative hypotheses. Incorrect They used sample statistics (like x̄ or s2) instead of population parameters. Correct MC60e9_6058
Your lab partner is trying again (eye roll).
Scenario: Two-sample variance test (F test)
Ecologists want to know whether the variability of Shannon Diversity Index measurements changed between 2014 and 2024.
Research question: Is the 2024 value smaller than the 2014 value?
They wrote the hypotheses below:
H0: σ20242 (sigma^2_2024) < σ20142 (sigma^2_2014)
In words: The variance Shannon Diversity Index value in 2024 is less than the value in 2014.
HA: σ20242 (sigma^2_2024) ≥ σ20142 (sigma^2_2014)
In words: The variance Shannon Diversity Index value in 2024 is greater than or equal to the value in 2014.
What is the main problem with their hypotheses?
They used sample statistics (like x̄ or s2) instead of population parameters. Incorrect They wrote the null hypothesis as an inequality (the null should include equality). Correct Nothing is wrong; the hypotheses are stated correctly. Incorrect They swapped the null and alternative hypotheses. Incorrect MC4cb3_ab9c
Your lab partner is trying again (eye roll).
Scenario: One-sample mean test (baby weights)
Joe's Hospital of Fried Foods claims their newborns are heavier than the national average.
The national average birth weight is 7.5 lbs.
Research question: Is the mean lower than 7.5 lbs?
They wrote the hypotheses below:
H0: x̄hospital (xbar_hospital) = 7.5
In words: The hospital mean birth weight equals 7.5 lbs.
HA: x̄hospital (xbar_hospital) < 7.5
In words: The hospital mean birth weight is less than 7.5 lbs.
What is the main problem with their hypotheses?
They wrote the null hypothesis as an inequality (the null should include equality). Incorrect They swapped the null and alternative hypotheses. Incorrect Nothing is wrong; the hypotheses are stated correctly. Incorrect They used sample statistics (like x̄ or s2) instead of population parameters. Correct MC2f08_6058
Your lab partner is trying again (eye roll).
Scenario: ANOVA (five years of Shannon diversity)
Ecologists measure Shannon Diversity Index at the same set of sites across five years (1994, 2004, 2009, 2014, 2024).
Research question: Are any of the group means different?
They wrote the hypotheses below:
H0: At least one group mean is different.
In words: At least one group mean is different.
HA: All group means are equal.
In words: All group means are equal.
What is the main problem with their hypotheses?
They used sample statistics (like x̄ or s2) instead of population parameters. Incorrect They wrote the null hypothesis as an inequality (the null should include equality). Correct Nothing is wrong; the hypotheses are stated correctly. Incorrect They swapped the null and alternative hypotheses. Incorrect MCde97_452d
Your lab partner is trying again (eye roll).
Scenario: Two-sample mean test (Shannon diversity 2014 vs 2024)
Ecologists compare Shannon Diversity Index measurements taken at the same set of sites in 2014 and 2024.
Research question: Are the 2014 and 2024 values different?
They wrote the hypotheses below:
H0: μ2014 (mu_2014) ≠ μ2024 (mu_2024)
In words: The mean Shannon Diversity Index values in 2014 and 2024 are different.
HA: μ2014 (mu_2014) = μ2024 (mu_2024)
In words: The mean Shannon Diversity Index values in 2014 and 2024 are equal.
What is the main problem with their hypotheses?
Nothing is wrong; the hypotheses are stated correctly. Incorrect They swapped the null and alternative hypotheses. Correct They used sample statistics (like x̄ or s2) instead of population parameters. Incorrect They wrote the null hypothesis as an inequality (the null should include equality). Incorrect MC5a97_a637
Your lab partner is trying again (eye roll).
Scenario: Two-sample variance test (F test)
Ecologists want to know whether the variability of Shannon Diversity Index measurements changed between 2014 and 2024.
Research question: Is the 2024 value larger than the 2014 value?
They wrote the hypotheses below:
H0: s20142 (s2_2014) = s20242 (s2_2024)
In words: The variance Shannon Diversity Index values in 2014 and 2024 are equal.
HA: s20242 (s2_2024) > s20142 (s2_2014)
In words: The variance Shannon Diversity Index value in 2024 is greater than the value in 2014.
What is the main problem with their hypotheses?
They used sample statistics (like x̄ or s2) instead of population parameters. Correct Nothing is wrong; the hypotheses are stated correctly. Incorrect They wrote the null hypothesis as an inequality (the null should include equality). Incorrect They swapped the null and alternative hypotheses. Incorrect MC41ba_6058
Your lab partner is trying again (eye roll).
Scenario: Two-sample mean test (Shannon diversity 2014 vs 2024)
Ecologists compare Shannon Diversity Index measurements taken at the same set of sites in 2014 and 2024.
Research question: Is the 2024 value smaller than the 2014 value?
They wrote the hypotheses below:
H0: μ2024 (mu_2024) < μ2014 (mu_2014)
In words: The mean Shannon Diversity Index value in 2024 is less than the value in 2014.
HA: μ2014 (mu_2014) = μ2024 (mu_2024)
In words: The mean Shannon Diversity Index values in 2014 and 2024 are equal.
What is the main problem with their hypotheses?
They used sample statistics (like x̄ or s2) instead of population parameters. Incorrect They wrote the null hypothesis as an inequality (the null should include equality). Incorrect Nothing is wrong; the hypotheses are stated correctly. Incorrect They swapped the null and alternative hypotheses. Correct MCab50_6058
Your lab partner is trying again (eye roll).
Scenario: Two-sample variance test (F test)
Ecologists want to know whether the variability of Shannon Diversity Index measurements changed between 2014 and 2024.
Research question: Is the 2024 value larger than the 2014 value?
They wrote the hypotheses below:
H0: σ20242 (sigma^2_2024) > σ20142 (sigma^2_2014)
In words: The variance Shannon Diversity Index value in 2024 is greater than the value in 2014.
HA: σ20142 (sigma^2_2014) = σ20242 (sigma^2_2024)
In words: The variance Shannon Diversity Index values in 2014 and 2024 are equal.
What is the main problem with their hypotheses?
They used sample statistics (like x̄ or s2) instead of population parameters. Incorrect They wrote the null hypothesis as an inequality (the null should include equality). Incorrect Nothing is wrong; the hypotheses are stated correctly. Incorrect They swapped the null and alternative hypotheses. Correct MC4f68_452d
Your lab partner is trying again (eye roll).
Scenario: One-sample mean test (baby weights)
Joe's Hospital of Fried Foods claims their newborns are heavier than the national average.
The national average birth weight is 7.5 lbs.
Research question: Is the mean lower than 7.5 lbs?
They wrote the hypotheses below:
H0: μhospital (mu_hospital) < 7.5
In words: The hospital mean birth weight is less than 7.5 lbs.
HA: μhospital (mu_hospital) = 7.5
In words: The hospital mean birth weight equals 7.5 lbs.
What is the main problem with their hypotheses?
Nothing is wrong; the hypotheses are stated correctly. Incorrect They swapped the null and alternative hypotheses. Correct They used sample statistics (like x̄ or s2) instead of population parameters. Incorrect They wrote the null hypothesis as an inequality (the null should include equality). Incorrect MCd8bb_4801
Your lab partner is trying again (eye roll).
Scenario: Two-sample mean test (Shannon diversity 2014 vs 2024)
Ecologists compare Shannon Diversity Index measurements taken at the same set of sites in 2014 and 2024.
Research question: Is the 2024 value larger than the 2014 value?
They wrote the hypotheses below:
H0: μ2024 (mu_2024) > μ2014 (mu_2014)
In words: The mean Shannon Diversity Index value in 2024 is greater than the value in 2014.
HA: μ2024 (mu_2024) ≤ μ2014 (mu_2014)
In words: The mean Shannon Diversity Index value in 2024 is less than or equal to the value in 2014.
What is the main problem with their hypotheses?
They used sample statistics (like x̄ or s2) instead of population parameters. Incorrect They swapped the null and alternative hypotheses. Incorrect Nothing is wrong; the hypotheses are stated correctly. Incorrect They wrote the null hypothesis as an inequality (the null should include equality). Correct MC1b81_d028
Your lab partner is trying again (eye roll).
Scenario: ANOVA (five years of Shannon diversity)
Ecologists measure Shannon Diversity Index at the same set of sites across five years (1994, 2004, 2009, 2014, 2024).
Research question: Are any of the group means different?
They wrote the hypotheses below:
H0: All sample means are equal.
In words: All sample means are equal.
HA: At least one sample mean is different.
In words: At least one sample mean is different.
What is the main problem with their hypotheses?
They used sample statistics (like x̄ or s2) instead of population parameters. Correct They swapped the null and alternative hypotheses. Incorrect They wrote the null hypothesis as an inequality (the null should include equality). Incorrect Nothing is wrong; the hypotheses are stated correctly. Incorrect MC2f08_4294
Your lab partner is trying again (eye roll).
Scenario: ANOVA (five years of Shannon diversity)
Ecologists measure Shannon Diversity Index at the same set of sites across five years (1994, 2004, 2009, 2014, 2024).
Research question: Are any of the group means different?
They wrote the hypotheses below:
H0: At least one group mean is different.
In words: At least one group mean is different.
HA: All group means are equal.
In words: All group means are equal.
What is the main problem with their hypotheses?
Nothing is wrong; the hypotheses are stated correctly. Incorrect They swapped the null and alternative hypotheses. Correct They wrote the null hypothesis as an inequality (the null should include equality). Incorrect They used sample statistics (like x̄ or s2) instead of population parameters. Incorrect MC1ed2_edf2
Your lab partner is trying again (eye roll).
Scenario: One-sample mean test (baby weights)
Joe's Hospital of Fried Foods claims their newborns are heavier than the national average.
The national average birth weight is 7.5 lbs.
Research question: Is the mean higher than 7.5 lbs?
They wrote the hypotheses below:
H0: μhospital (mu_hospital) = 7.5
In words: The hospital mean birth weight equals 7.5 lbs.
HA: μhospital (mu_hospital) > 7.5
In words: The hospital mean birth weight is greater than 7.5 lbs.
What is the main problem with their hypotheses?
Nothing is wrong; the hypotheses are stated correctly. Correct They wrote the null hypothesis as an inequality (the null should include equality). Incorrect They swapped the null and alternative hypotheses. Incorrect They used sample statistics (like x̄ or s2) instead of population parameters. Incorrect MCad0c_2713
Your lab partner is trying again (eye roll).
Scenario: Two-sample variance test (F test)
Ecologists want to know whether the variability of Shannon Diversity Index measurements changed between 2014 and 2024.
Research question: Is the 2024 value smaller than the 2014 value?
They wrote the hypotheses below:
H0: σ20142 (sigma^2_2014) = σ20242 (sigma^2_2024)
In words: The variance Shannon Diversity Index values in 2014 and 2024 are equal.
HA: σ20242 (sigma^2_2024) < σ20142 (sigma^2_2014)
In words: The variance Shannon Diversity Index value in 2024 is less than the value in 2014.
What is the main problem with their hypotheses?
They wrote the null hypothesis as an inequality (the null should include equality). Incorrect They used sample statistics (like x̄ or s2) instead of population parameters. Incorrect They swapped the null and alternative hypotheses. Incorrect Nothing is wrong; the hypotheses are stated correctly. Correct MC4cb3_5ac7
Your lab partner is trying again (eye roll).
Scenario: One-sample mean test (baby weights)
Joe's Hospital of Fried Foods claims their newborns are heavier than the national average.
The national average birth weight is 7.5 lbs.
Research question: Is the mean lower than 7.5 lbs?
They wrote the hypotheses below:
H0: x̄hospital (xbar_hospital) = 7.5
In words: The hospital mean birth weight equals 7.5 lbs.
HA: x̄hospital (xbar_hospital) < 7.5
In words: The hospital mean birth weight is less than 7.5 lbs.
What is the main problem with their hypotheses?
They wrote the null hypothesis as an inequality (the null should include equality). Incorrect They swapped the null and alternative hypotheses. Incorrect They used sample statistics (like x̄ or s2) instead of population parameters. Correct Nothing is wrong; the hypotheses are stated correctly. Incorrect MC5a97_61d2
Your lab partner is trying again (eye roll).
Scenario: Two-sample variance test (F test)
Ecologists want to know whether the variability of Shannon Diversity Index measurements changed between 2014 and 2024.
Research question: Is the 2024 value larger than the 2014 value?
They wrote the hypotheses below:
H0: s20142 (s2_2014) = s20242 (s2_2024)
In words: The variance Shannon Diversity Index values in 2014 and 2024 are equal.
HA: s20242 (s2_2024) > s20142 (s2_2014)
In words: The variance Shannon Diversity Index value in 2024 is greater than the value in 2014.
What is the main problem with their hypotheses?
They wrote the null hypothesis as an inequality (the null should include equality). Incorrect Nothing is wrong; the hypotheses are stated correctly. Incorrect They swapped the null and alternative hypotheses. Incorrect They used sample statistics (like x̄ or s2) instead of population parameters. Correct MC2f08_ab9c
Your lab partner is trying again (eye roll).
Scenario: ANOVA (five years of Shannon diversity)
Ecologists measure Shannon Diversity Index at the same set of sites across five years (1994, 2004, 2009, 2014, 2024).
Research question: Are any of the group means different?
They wrote the hypotheses below:
H0: At least one group mean is different.
In words: At least one group mean is different.
HA: All group means are equal.
In words: All group means are equal.
What is the main problem with their hypotheses?
They wrote the null hypothesis as an inequality (the null should include equality). Incorrect They swapped the null and alternative hypotheses. Correct Nothing is wrong; the hypotheses are stated correctly. Incorrect They used sample statistics (like x̄ or s2) instead of population parameters. Incorrect MC4a0c_4801
Your lab partner is trying again (eye roll).
Scenario: Two-sample mean test (Shannon diversity 2014 vs 2024)
Ecologists compare Shannon Diversity Index measurements taken at the same set of sites in 2014 and 2024.
Research question: Is the 2024 value smaller than the 2014 value?
They wrote the hypotheses below:
H0: μ2014 (mu_2014) = μ2024 (mu_2024)
In words: The mean Shannon Diversity Index values in 2014 and 2024 are equal.
HA: μ2024 (mu_2024) < μ2014 (mu_2014)
In words: The mean Shannon Diversity Index value in 2024 is less than the value in 2014.
What is the main problem with their hypotheses?
They used sample statistics (like x̄ or s2) instead of population parameters. Incorrect They swapped the null and alternative hypotheses. Incorrect Nothing is wrong; the hypotheses are stated correctly. Correct They wrote the null hypothesis as an inequality (the null should include equality). Incorrect MC5ff2_df6c
Your lab partner is trying again (eye roll).
Scenario: Two-sample variance test (F test)
Ecologists want to know whether the variability of Shannon Diversity Index measurements changed between 2014 and 2024.
Research question: Are the 2014 and 2024 values different?
They wrote the hypotheses below:
H0: σ20142 (sigma^2_2014) ≠ σ20242 (sigma^2_2024)
In words: The variance Shannon Diversity Index values in 2014 and 2024 are different.
HA: σ20142 (sigma^2_2014) = σ20242 (sigma^2_2024)
In words: The variance Shannon Diversity Index values in 2014 and 2024 are equal.
What is the main problem with their hypotheses?
They used sample statistics (like x̄ or s2) instead of population parameters. Incorrect Nothing is wrong; the hypotheses are stated correctly. Incorrect They swapped the null and alternative hypotheses. Incorrect They wrote the null hypothesis as an inequality (the null should include equality). Correct MCde97_61d2
Your lab partner is trying again (eye roll).
Scenario: Two-sample mean test (Shannon diversity 2014 vs 2024)
Ecologists compare Shannon Diversity Index measurements taken at the same set of sites in 2014 and 2024.
Research question: Are the 2014 and 2024 values different?
They wrote the hypotheses below:
H0: μ2014 (mu_2014) ≠ μ2024 (mu_2024)
In words: The mean Shannon Diversity Index values in 2014 and 2024 are different.
HA: μ2014 (mu_2014) = μ2024 (mu_2024)
In words: The mean Shannon Diversity Index values in 2014 and 2024 are equal.
What is the main problem with their hypotheses?
They wrote the null hypothesis as an inequality (the null should include equality). Correct Nothing is wrong; the hypotheses are stated correctly. Incorrect They swapped the null and alternative hypotheses. Incorrect They used sample statistics (like x̄ or s2) instead of population parameters. Incorrect MC9df1_749e
Your lab partner is trying again (eye roll).
Scenario: ANOVA (five years of Shannon diversity)
Ecologists measure Shannon Diversity Index at the same set of sites across five years (1994, 2004, 2009, 2014, 2024).
Research question: Are any of the group means different?
They wrote the hypotheses below:
H0: All group means are equal.
In words: All group means are equal.
HA: At least one group mean is different.
In words: At least one group mean is different.
What is the main problem with their hypotheses?
They wrote the null hypothesis as an inequality (the null should include equality). Incorrect Nothing is wrong; the hypotheses are stated correctly. Correct They used sample statistics (like x̄ or s2) instead of population parameters. Incorrect They swapped the null and alternative hypotheses. Incorrect MC2f08_d028
Your lab partner is trying again (eye roll).
Scenario: ANOVA (five years of Shannon diversity)
Ecologists measure Shannon Diversity Index at the same set of sites across five years (1994, 2004, 2009, 2014, 2024).
Research question: Are any of the group means different?
They wrote the hypotheses below:
H0: At least one group mean is different.
In words: At least one group mean is different.
HA: All group means are equal.
In words: All group means are equal.
What is the main problem with their hypotheses?
They used sample statistics (like x̄ or s2) instead of population parameters. Incorrect They swapped the null and alternative hypotheses. Incorrect They wrote the null hypothesis as an inequality (the null should include equality). Correct Nothing is wrong; the hypotheses are stated correctly. Incorrect MC2f08_4801
Your lab partner is trying again (eye roll).
Scenario: ANOVA (five years of Shannon diversity)
Ecologists measure Shannon Diversity Index at the same set of sites across five years (1994, 2004, 2009, 2014, 2024).
Research question: Are any of the group means different?
They wrote the hypotheses below:
H0: At least one group mean is different.
In words: At least one group mean is different.
HA: All group means are equal.
In words: All group means are equal.
What is the main problem with their hypotheses?
They used sample statistics (like x̄ or s2) instead of population parameters. Incorrect They swapped the null and alternative hypotheses. Incorrect Nothing is wrong; the hypotheses are stated correctly. Incorrect They wrote the null hypothesis as an inequality (the null should include equality). Correct MC9e8e_88e3
Your lab partner is trying again (eye roll).
Scenario: One-sample mean test (baby weights)
Joe's Hospital of Fried Foods claims their newborns are heavier than the national average.
The national average birth weight is 7.5 lbs.
Research question: Is the mean different from 7.5 lbs?
They wrote the hypotheses below:
H0: μhospital (mu_hospital) ≠ 7.5
In words: The hospital mean birth weight is different from 7.5 lbs.
HA: μhospital (mu_hospital) = 7.5
In words: The hospital mean birth weight equals 7.5 lbs.
What is the main problem with their hypotheses?
They used sample statistics (like x̄ or s2) instead of population parameters. Incorrect They wrote the null hypothesis as an inequality (the null should include equality). Correct They swapped the null and alternative hypotheses. Incorrect Nothing is wrong; the hypotheses are stated correctly. Incorrect MCedb5_749e
Your lab partner is trying again (eye roll).
Scenario: Two-sample mean test (Shannon diversity 2014 vs 2024)
Ecologists compare Shannon Diversity Index measurements taken at the same set of sites in 2014 and 2024.
Research question: Is the 2024 value larger than the 2014 value?
They wrote the hypotheses below:
H0: μ2014 (mu_2014) = μ2024 (mu_2024)
In words: The mean Shannon Diversity Index values in 2014 and 2024 are equal.
HA: μ2024 (mu_2024) > μ2014 (mu_2014)
In words: The mean Shannon Diversity Index value in 2024 is greater than the value in 2014.
What is the main problem with their hypotheses?
They wrote the null hypothesis as an inequality (the null should include equality). Incorrect Nothing is wrong; the hypotheses are stated correctly. Correct They used sample statistics (like x̄ or s2) instead of population parameters. Incorrect They swapped the null and alternative hypotheses. Incorrect MCa6e0_749e
Your lab partner is trying again (eye roll).
Scenario: Two-sample mean test (Shannon diversity 2014 vs 2024)
Ecologists compare Shannon Diversity Index measurements taken at the same set of sites in 2014 and 2024.
Research question: Is the 2024 value smaller than the 2014 value?
They wrote the hypotheses below:
H0: μ2024 (mu_2024) < μ2014 (mu_2014)
In words: The mean Shannon Diversity Index value in 2024 is less than the value in 2014.
HA: μ2024 (mu_2024) ≥ μ2014 (mu_2014)
In words: The mean Shannon Diversity Index value in 2024 is greater than or equal to the value in 2014.
What is the main problem with their hypotheses?
They wrote the null hypothesis as an inequality (the null should include equality). Correct Nothing is wrong; the hypotheses are stated correctly. Incorrect They used sample statistics (like x̄ or s2) instead of population parameters. Incorrect They swapped the null and alternative hypotheses. Incorrect MC5de4_5800
Your lab partner is trying again (eye roll).
Scenario: Two-sample mean test (Shannon diversity 2014 vs 2024)
Ecologists compare Shannon Diversity Index measurements taken at the same set of sites in 2014 and 2024.
Research question: Is the 2024 value larger than the 2014 value?
They wrote the hypotheses below:
H0: μ2024 (mu_2024) > μ2014 (mu_2014)
In words: The mean Shannon Diversity Index value in 2024 is greater than the value in 2014.
HA: μ2014 (mu_2014) = μ2024 (mu_2024)
In words: The mean Shannon Diversity Index values in 2014 and 2024 are equal.
What is the main problem with their hypotheses?
Nothing is wrong; the hypotheses are stated correctly. Incorrect They used sample statistics (like x̄ or s2) instead of population parameters. Incorrect They swapped the null and alternative hypotheses. Correct They wrote the null hypothesis as an inequality (the null should include equality). Incorrect MC5de4_215b
Your lab partner is trying again (eye roll).
Scenario: Two-sample mean test (Shannon diversity 2014 vs 2024)
Ecologists compare Shannon Diversity Index measurements taken at the same set of sites in 2014 and 2024.
Research question: Is the 2024 value larger than the 2014 value?
They wrote the hypotheses below:
H0: μ2024 (mu_2024) > μ2014 (mu_2014)
In words: The mean Shannon Diversity Index value in 2024 is greater than the value in 2014.
HA: μ2014 (mu_2014) = μ2024 (mu_2024)
In words: The mean Shannon Diversity Index values in 2014 and 2024 are equal.
What is the main problem with their hypotheses?
Nothing is wrong; the hypotheses are stated correctly. Incorrect They used sample statistics (like x̄ or s2) instead of population parameters. Incorrect They wrote the null hypothesis as an inequality (the null should include equality). Incorrect They swapped the null and alternative hypotheses. Correct MC1b81_cfa8
Your lab partner is trying again (eye roll).
Scenario: ANOVA (five years of Shannon diversity)
Ecologists measure Shannon Diversity Index at the same set of sites across five years (1994, 2004, 2009, 2014, 2024).
Research question: Are any of the group means different?
They wrote the hypotheses below:
H0: All sample means are equal.
In words: All sample means are equal.
HA: At least one sample mean is different.
In words: At least one sample mean is different.
What is the main problem with their hypotheses?
They wrote the null hypothesis as an inequality (the null should include equality). Incorrect They used sample statistics (like x̄ or s2) instead of population parameters. Correct Nothing is wrong; the hypotheses are stated correctly. Incorrect They swapped the null and alternative hypotheses. Incorrect MC5dec_ebe5
Your lab partner is trying again (eye roll).
Scenario: One-sample mean test (baby weights)
Joe's Hospital of Fried Foods claims their newborns are heavier than the national average.
The national average birth weight is 7.5 lbs.
Research question: Is the mean higher than 7.5 lbs?
They wrote the hypotheses below:
H0: μhospital (mu_hospital) > 7.5
In words: The hospital mean birth weight is greater than 7.5 lbs.
HA: μhospital (mu_hospital) = 7.5
In words: The hospital mean birth weight equals 7.5 lbs.
What is the main problem with their hypotheses?
They swapped the null and alternative hypotheses. Correct They used sample statistics (like x̄ or s2) instead of population parameters. Incorrect They wrote the null hypothesis as an inequality (the null should include equality). Incorrect Nothing is wrong; the hypotheses are stated correctly. Incorrect MC0db2_f8be
Your lab partner is trying again (eye roll).
Scenario: Two-sample variance test (F test)
Ecologists want to know whether the variability of Shannon Diversity Index measurements changed between 2014 and 2024.
Research question: Is the 2024 value larger than the 2014 value?
They wrote the hypotheses below:
H0: σ20142 (sigma^2_2014) = σ20242 (sigma^2_2024)
In words: The variance Shannon Diversity Index values in 2014 and 2024 are equal.
HA: σ20242 (sigma^2_2024) > σ20142 (sigma^2_2014)
In words: The variance Shannon Diversity Index value in 2024 is greater than the value in 2014.
What is the main problem with their hypotheses?
Nothing is wrong; the hypotheses are stated correctly. Correct They wrote the null hypothesis as an inequality (the null should include equality). Incorrect They used sample statistics (like x̄ or s2) instead of population parameters. Incorrect They swapped the null and alternative hypotheses. Incorrect MC5a97_4801
Your lab partner is trying again (eye roll).
Scenario: Two-sample variance test (F test)
Ecologists want to know whether the variability of Shannon Diversity Index measurements changed between 2014 and 2024.
Research question: Is the 2024 value larger than the 2014 value?
They wrote the hypotheses below:
H0: s20142 (s2_2014) = s20242 (s2_2024)
In words: The variance Shannon Diversity Index values in 2014 and 2024 are equal.
HA: s20242 (s2_2024) > s20142 (s2_2014)
In words: The variance Shannon Diversity Index value in 2024 is greater than the value in 2014.
What is the main problem with their hypotheses?
They used sample statistics (like x̄ or s2) instead of population parameters. Correct They swapped the null and alternative hypotheses. Incorrect Nothing is wrong; the hypotheses are stated correctly. Incorrect They wrote the null hypothesis as an inequality (the null should include equality). Incorrect MC5de4_edf2
Your lab partner is trying again (eye roll).
Scenario: Two-sample mean test (Shannon diversity 2014 vs 2024)
Ecologists compare Shannon Diversity Index measurements taken at the same set of sites in 2014 and 2024.
Research question: Is the 2024 value larger than the 2014 value?
They wrote the hypotheses below:
H0: μ2024 (mu_2024) > μ2014 (mu_2014)
In words: The mean Shannon Diversity Index value in 2024 is greater than the value in 2014.
HA: μ2014 (mu_2014) = μ2024 (mu_2024)
In words: The mean Shannon Diversity Index values in 2014 and 2024 are equal.
What is the main problem with their hypotheses?
Nothing is wrong; the hypotheses are stated correctly. Incorrect They wrote the null hypothesis as an inequality (the null should include equality). Incorrect They swapped the null and alternative hypotheses. Correct They used sample statistics (like x̄ or s2) instead of population parameters. Incorrect MC2f08_61d2
Your lab partner is trying again (eye roll).
Scenario: ANOVA (five years of Shannon diversity)
Ecologists measure Shannon Diversity Index at the same set of sites across five years (1994, 2004, 2009, 2014, 2024).
Research question: Are any of the group means different?
They wrote the hypotheses below:
H0: At least one group mean is different.
In words: At least one group mean is different.
HA: All group means are equal.
In words: All group means are equal.
What is the main problem with their hypotheses?
They wrote the null hypothesis as an inequality (the null should include equality). Correct Nothing is wrong; the hypotheses are stated correctly. Incorrect They swapped the null and alternative hypotheses. Incorrect They used sample statistics (like x̄ or s2) instead of population parameters. Incorrect MCedb5_bd8f
Your lab partner is trying again (eye roll).
Scenario: Two-sample mean test (Shannon diversity 2014 vs 2024)
Ecologists compare Shannon Diversity Index measurements taken at the same set of sites in 2014 and 2024.
Research question: Is the 2024 value larger than the 2014 value?
They wrote the hypotheses below:
H0: μ2014 (mu_2014) = μ2024 (mu_2024)
In words: The mean Shannon Diversity Index values in 2014 and 2024 are equal.
HA: μ2024 (mu_2024) > μ2014 (mu_2014)
In words: The mean Shannon Diversity Index value in 2024 is greater than the value in 2014.
What is the main problem with their hypotheses?
They swapped the null and alternative hypotheses. Incorrect They wrote the null hypothesis as an inequality (the null should include equality). Incorrect Nothing is wrong; the hypotheses are stated correctly. Correct They used sample statistics (like x̄ or s2) instead of population parameters. Incorrect MCd8bb_5ac7
Your lab partner is trying again (eye roll).
Scenario: Two-sample mean test (Shannon diversity 2014 vs 2024)
Ecologists compare Shannon Diversity Index measurements taken at the same set of sites in 2014 and 2024.
Research question: Is the 2024 value larger than the 2014 value?
They wrote the hypotheses below:
H0: μ2024 (mu_2024) > μ2014 (mu_2014)
In words: The mean Shannon Diversity Index value in 2024 is greater than the value in 2014.
HA: μ2024 (mu_2024) ≤ μ2014 (mu_2014)
In words: The mean Shannon Diversity Index value in 2024 is less than or equal to the value in 2014.
What is the main problem with their hypotheses?
They wrote the null hypothesis as an inequality (the null should include equality). Correct They swapped the null and alternative hypotheses. Incorrect They used sample statistics (like x̄ or s2) instead of population parameters. Incorrect Nothing is wrong; the hypotheses are stated correctly. Incorrect MC2f08_749e
Your lab partner is trying again (eye roll).
Scenario: ANOVA (five years of Shannon diversity)
Ecologists measure Shannon Diversity Index at the same set of sites across five years (1994, 2004, 2009, 2014, 2024).
Research question: Are any of the group means different?
They wrote the hypotheses below:
H0: At least one group mean is different.
In words: At least one group mean is different.
HA: All group means are equal.
In words: All group means are equal.
What is the main problem with their hypotheses?
They wrote the null hypothesis as an inequality (the null should include equality). Incorrect Nothing is wrong; the hypotheses are stated correctly. Incorrect They used sample statistics (like x̄ or s2) instead of population parameters. Incorrect They swapped the null and alternative hypotheses. Correct MC7ca0_6058
Your lab partner is trying again (eye roll).
Scenario: One-sample mean test (baby weights)
Joe's Hospital of Fried Foods claims their newborns are heavier than the national average.
The national average birth weight is 7.5 lbs.
Research question: Is the mean different from 7.5 lbs?
They wrote the hypotheses below:
H0: x̄hospital (xbar_hospital) = 7.5
In words: The hospital mean birth weight equals 7.5 lbs.
HA: x̄hospital (xbar_hospital) ≠ 7.5
In words: The hospital mean birth weight is different from 7.5 lbs.
What is the main problem with their hypotheses?
They used sample statistics (like x̄ or s2) instead of population parameters. Correct They wrote the null hypothesis as an inequality (the null should include equality). Incorrect Nothing is wrong; the hypotheses are stated correctly. Incorrect They swapped the null and alternative hypotheses. Incorrect MC2f08_88e3
Your lab partner is trying again (eye roll).
Scenario: ANOVA (five years of Shannon diversity)
Ecologists measure Shannon Diversity Index at the same set of sites across five years (1994, 2004, 2009, 2014, 2024).
Research question: Are any of the group means different?
They wrote the hypotheses below:
H0: At least one group mean is different.
In words: At least one group mean is different.
HA: All group means are equal.
In words: All group means are equal.
What is the main problem with their hypotheses?
They used sample statistics (like x̄ or s2) instead of population parameters. Incorrect They wrote the null hypothesis as an inequality (the null should include equality). Correct They swapped the null and alternative hypotheses. Incorrect Nothing is wrong; the hypotheses are stated correctly. Incorrect MC373a_4294
Your lab partner is trying again (eye roll).
Scenario: Two-sample variance test (F test)
Ecologists want to know whether the variability of Shannon Diversity Index measurements changed between 2014 and 2024.
Research question: Is the 2024 value smaller than the 2014 value?
They wrote the hypotheses below:
H0: s20142 (s2_2014) = s20242 (s2_2024)
In words: The variance Shannon Diversity Index values in 2014 and 2024 are equal.
HA: s20242 (s2_2024) < s20142 (s2_2014)
In words: The variance Shannon Diversity Index value in 2024 is less than the value in 2014.
What is the main problem with their hypotheses?
Nothing is wrong; the hypotheses are stated correctly. Incorrect They swapped the null and alternative hypotheses. Incorrect They wrote the null hypothesis as an inequality (the null should include equality). Incorrect They used sample statistics (like x̄ or s2) instead of population parameters. Correct MCedb5_ebe5
Your lab partner is trying again (eye roll).
Scenario: Two-sample mean test (Shannon diversity 2014 vs 2024)
Ecologists compare Shannon Diversity Index measurements taken at the same set of sites in 2014 and 2024.
Research question: Is the 2024 value larger than the 2014 value?
They wrote the hypotheses below:
H0: μ2014 (mu_2014) = μ2024 (mu_2024)
In words: The mean Shannon Diversity Index values in 2014 and 2024 are equal.
HA: μ2024 (mu_2024) > μ2014 (mu_2014)
In words: The mean Shannon Diversity Index value in 2024 is greater than the value in 2014.
What is the main problem with their hypotheses?
They swapped the null and alternative hypotheses. Incorrect They used sample statistics (like x̄ or s2) instead of population parameters. Incorrect They wrote the null hypothesis as an inequality (the null should include equality). Incorrect Nothing is wrong; the hypotheses are stated correctly. Correct MC7ca0_edf2
Your lab partner is trying again (eye roll).
Scenario: One-sample mean test (baby weights)
Joe's Hospital of Fried Foods claims their newborns are heavier than the national average.
The national average birth weight is 7.5 lbs.
Research question: Is the mean different from 7.5 lbs?
They wrote the hypotheses below:
H0: x̄hospital (xbar_hospital) = 7.5
In words: The hospital mean birth weight equals 7.5 lbs.
HA: x̄hospital (xbar_hospital) ≠ 7.5
In words: The hospital mean birth weight is different from 7.5 lbs.
What is the main problem with their hypotheses?
Nothing is wrong; the hypotheses are stated correctly. Incorrect They wrote the null hypothesis as an inequality (the null should include equality). Incorrect They swapped the null and alternative hypotheses. Incorrect They used sample statistics (like x̄ or s2) instead of population parameters. Correct MCa6e0_df6c
Your lab partner is trying again (eye roll).
Scenario: Two-sample mean test (Shannon diversity 2014 vs 2024)
Ecologists compare Shannon Diversity Index measurements taken at the same set of sites in 2014 and 2024.
Research question: Is the 2024 value smaller than the 2014 value?
They wrote the hypotheses below:
H0: μ2024 (mu_2024) < μ2014 (mu_2014)
In words: The mean Shannon Diversity Index value in 2024 is less than the value in 2014.
HA: μ2024 (mu_2024) ≥ μ2014 (mu_2014)
In words: The mean Shannon Diversity Index value in 2024 is greater than or equal to the value in 2014.
What is the main problem with their hypotheses?
They used sample statistics (like x̄ or s2) instead of population parameters. Incorrect Nothing is wrong; the hypotheses are stated correctly. Incorrect They swapped the null and alternative hypotheses. Incorrect They wrote the null hypothesis as an inequality (the null should include equality). Correct MC0a7b_88e3
Your lab partner is trying again (eye roll).
Scenario: One-sample mean test (baby weights)
Joe's Hospital of Fried Foods claims their newborns are heavier than the national average.
The national average birth weight is 7.5 lbs.
Research question: Is the mean higher than 7.5 lbs?
They wrote the hypotheses below:
H0: x̄hospital (xbar_hospital) = 7.5
In words: The hospital mean birth weight equals 7.5 lbs.
HA: x̄hospital (xbar_hospital) > 7.5
In words: The hospital mean birth weight is greater than 7.5 lbs.
What is the main problem with their hypotheses?
They used sample statistics (like x̄ or s2) instead of population parameters. Correct They wrote the null hypothesis as an inequality (the null should include equality). Incorrect They swapped the null and alternative hypotheses. Incorrect Nothing is wrong; the hypotheses are stated correctly. Incorrect MCde97_bd8f
Your lab partner is trying again (eye roll).
Scenario: Two-sample mean test (Shannon diversity 2014 vs 2024)
Ecologists compare Shannon Diversity Index measurements taken at the same set of sites in 2014 and 2024.
Research question: Are the 2014 and 2024 values different?
They wrote the hypotheses below:
H0: μ2014 (mu_2014) ≠ μ2024 (mu_2024)
In words: The mean Shannon Diversity Index values in 2014 and 2024 are different.
HA: μ2014 (mu_2014) = μ2024 (mu_2024)
In words: The mean Shannon Diversity Index values in 2014 and 2024 are equal.
What is the main problem with their hypotheses?
They swapped the null and alternative hypotheses. Incorrect They wrote the null hypothesis as an inequality (the null should include equality). Correct Nothing is wrong; the hypotheses are stated correctly. Incorrect They used sample statistics (like x̄ or s2) instead of population parameters. Incorrect MCe071_452d
Your lab partner is trying again (eye roll).
Scenario: Two-sample variance test (F test)
Ecologists want to know whether the variability of Shannon Diversity Index measurements changed between 2014 and 2024.
Research question: Are the 2014 and 2024 values different?
They wrote the hypotheses below:
H0: s20142 (s2_2014) = s20242 (s2_2024)
In words: The variance Shannon Diversity Index values in 2014 and 2024 are equal.
HA: s20142 (s2_2014) ≠ s20242 (s2_2024)
In words: The variance Shannon Diversity Index values in 2014 and 2024 are different.
What is the main problem with their hypotheses?
Nothing is wrong; the hypotheses are stated correctly. Incorrect They swapped the null and alternative hypotheses. Incorrect They used sample statistics (like x̄ or s2) instead of population parameters. Correct They wrote the null hypothesis as an inequality (the null should include equality). Incorrect MC7f90_f8be
Your lab partner is trying again (eye roll).
Scenario: One-sample mean test (baby weights)
Joe's Hospital of Fried Foods claims their newborns are heavier than the national average.
The national average birth weight is 7.5 lbs.
Research question: Is the mean different from 7.5 lbs?
They wrote the hypotheses below:
H0: μhospital (mu_hospital) = 7.5
In words: The hospital mean birth weight equals 7.5 lbs.
HA: μhospital (mu_hospital) ≠ 7.5
In words: The hospital mean birth weight is different from 7.5 lbs.
What is the main problem with their hypotheses?
Nothing is wrong; the hypotheses are stated correctly. Correct They wrote the null hypothesis as an inequality (the null should include equality). Incorrect They used sample statistics (like x̄ or s2) instead of population parameters. Incorrect They swapped the null and alternative hypotheses. Incorrect MC621d_6058
Your lab partner is trying again (eye roll).
Scenario: Two-sample mean test (Shannon diversity 2014 vs 2024)
Ecologists compare Shannon Diversity Index measurements taken at the same set of sites in 2014 and 2024.
Research question: Are the 2014 and 2024 values different?
They wrote the hypotheses below:
H0: μ2014 (mu_2014) = μ2024 (mu_2024)
In words: The mean Shannon Diversity Index values in 2014 and 2024 are equal.
HA: μ2014 (mu_2014) ≠ μ2024 (mu_2024)
In words: The mean Shannon Diversity Index values in 2014 and 2024 are different.
What is the main problem with their hypotheses?
They used sample statistics (like x̄ or s2) instead of population parameters. Incorrect They wrote the null hypothesis as an inequality (the null should include equality). Incorrect Nothing is wrong; the hypotheses are stated correctly. Correct They swapped the null and alternative hypotheses. Incorrect MC4a0c_88e3
Your lab partner is trying again (eye roll).
Scenario: Two-sample mean test (Shannon diversity 2014 vs 2024)
Ecologists compare Shannon Diversity Index measurements taken at the same set of sites in 2014 and 2024.
Research question: Is the 2024 value smaller than the 2014 value?
They wrote the hypotheses below:
H0: μ2014 (mu_2014) = μ2024 (mu_2024)
In words: The mean Shannon Diversity Index values in 2014 and 2024 are equal.
HA: μ2024 (mu_2024) < μ2014 (mu_2014)
In words: The mean Shannon Diversity Index value in 2024 is less than the value in 2014.
What is the main problem with their hypotheses?
They used sample statistics (like x̄ or s2) instead of population parameters. Incorrect They wrote the null hypothesis as an inequality (the null should include equality). Incorrect They swapped the null and alternative hypotheses. Incorrect Nothing is wrong; the hypotheses are stated correctly. Correct MC955b_d665
Your lab partner is trying again (eye roll).
Scenario: Two-sample mean test (Shannon diversity 2014 vs 2024)
Ecologists compare Shannon Diversity Index measurements taken at the same set of sites in 2014 and 2024.
Research question: Is the 2024 value smaller than the 2014 value?
They wrote the hypotheses below:
H0: x̄2014 (xbar_2014) = x̄2024 (xbar_2024)
In words: The mean Shannon Diversity Index values in 2014 and 2024 are equal.
HA: x̄2024 (xbar_2024) < x̄2014 (xbar_2014)
In words: The mean Shannon Diversity Index value in 2024 is less than the value in 2014.
What is the main problem with their hypotheses?
They swapped the null and alternative hypotheses. Incorrect Nothing is wrong; the hypotheses are stated correctly. Incorrect They wrote the null hypothesis as an inequality (the null should include equality). Incorrect They used sample statistics (like x̄ or s2) instead of population parameters. Correct MC5ff2_5800
Your lab partner is trying again (eye roll).
Scenario: Two-sample variance test (F test)
Ecologists want to know whether the variability of Shannon Diversity Index measurements changed between 2014 and 2024.
Research question: Are the 2014 and 2024 values different?
They wrote the hypotheses below:
H0: σ20142 (sigma^2_2014) ≠ σ20242 (sigma^2_2024)
In words: The variance Shannon Diversity Index values in 2014 and 2024 are different.
HA: σ20142 (sigma^2_2014) = σ20242 (sigma^2_2024)
In words: The variance Shannon Diversity Index values in 2014 and 2024 are equal.
What is the main problem with their hypotheses?
Nothing is wrong; the hypotheses are stated correctly. Incorrect They used sample statistics (like x̄ or s2) instead of population parameters. Incorrect They swapped the null and alternative hypotheses. Correct They wrote the null hypothesis as an inequality (the null should include equality). Incorrect MC9df1_88e3
Your lab partner is trying again (eye roll).
Scenario: ANOVA (five years of Shannon diversity)
Ecologists measure Shannon Diversity Index at the same set of sites across five years (1994, 2004, 2009, 2014, 2024).
Research question: Are any of the group means different?
They wrote the hypotheses below:
H0: All group means are equal.
In words: All group means are equal.
HA: At least one group mean is different.
In words: At least one group mean is different.
What is the main problem with their hypotheses?
They used sample statistics (like x̄ or s2) instead of population parameters. Incorrect They wrote the null hypothesis as an inequality (the null should include equality). Incorrect They swapped the null and alternative hypotheses. Incorrect Nothing is wrong; the hypotheses are stated correctly. Correct MC955b_88e3
Your lab partner is trying again (eye roll).
Scenario: Two-sample mean test (Shannon diversity 2014 vs 2024)
Ecologists compare Shannon Diversity Index measurements taken at the same set of sites in 2014 and 2024.
Research question: Is the 2024 value smaller than the 2014 value?
They wrote the hypotheses below:
H0: x̄2014 (xbar_2014) = x̄2024 (xbar_2024)
In words: The mean Shannon Diversity Index values in 2014 and 2024 are equal.
HA: x̄2024 (xbar_2024) < x̄2014 (xbar_2014)
In words: The mean Shannon Diversity Index value in 2024 is less than the value in 2014.
What is the main problem with their hypotheses?
They used sample statistics (like x̄ or s2) instead of population parameters. Correct They wrote the null hypothesis as an inequality (the null should include equality). Incorrect They swapped the null and alternative hypotheses. Incorrect Nothing is wrong; the hypotheses are stated correctly. Incorrect MC7f90_bd8f
Your lab partner is trying again (eye roll).
Scenario: One-sample mean test (baby weights)
Joe's Hospital of Fried Foods claims their newborns are heavier than the national average.
The national average birth weight is 7.5 lbs.
Research question: Is the mean different from 7.5 lbs?
They wrote the hypotheses below:
H0: μhospital (mu_hospital) = 7.5
In words: The hospital mean birth weight equals 7.5 lbs.
HA: μhospital (mu_hospital) ≠ 7.5
In words: The hospital mean birth weight is different from 7.5 lbs.
What is the main problem with their hypotheses?
They swapped the null and alternative hypotheses. Incorrect They wrote the null hypothesis as an inequality (the null should include equality). Incorrect Nothing is wrong; the hypotheses are stated correctly. Correct They used sample statistics (like x̄ or s2) instead of population parameters. Incorrect MC5ff2_61d2
Your lab partner is trying again (eye roll).
Scenario: Two-sample variance test (F test)
Ecologists want to know whether the variability of Shannon Diversity Index measurements changed between 2014 and 2024.
Research question: Are the 2014 and 2024 values different?
They wrote the hypotheses below:
H0: σ20142 (sigma^2_2014) ≠ σ20242 (sigma^2_2024)
In words: The variance Shannon Diversity Index values in 2014 and 2024 are different.
HA: σ20142 (sigma^2_2014) = σ20242 (sigma^2_2024)
In words: The variance Shannon Diversity Index values in 2014 and 2024 are equal.
What is the main problem with their hypotheses?
They wrote the null hypothesis as an inequality (the null should include equality). Correct Nothing is wrong; the hypotheses are stated correctly. Incorrect They swapped the null and alternative hypotheses. Incorrect They used sample statistics (like x̄ or s2) instead of population parameters. Incorrect MC7f90_ab9c
Your lab partner is trying again (eye roll).
Scenario: One-sample mean test (baby weights)
Joe's Hospital of Fried Foods claims their newborns are heavier than the national average.
The national average birth weight is 7.5 lbs.
Research question: Is the mean different from 7.5 lbs?
They wrote the hypotheses below:
H0: μhospital (mu_hospital) = 7.5
In words: The hospital mean birth weight equals 7.5 lbs.
HA: μhospital (mu_hospital) ≠ 7.5
In words: The hospital mean birth weight is different from 7.5 lbs.
What is the main problem with their hypotheses?
They wrote the null hypothesis as an inequality (the null should include equality). Incorrect They swapped the null and alternative hypotheses. Incorrect Nothing is wrong; the hypotheses are stated correctly. Correct They used sample statistics (like x̄ or s2) instead of population parameters. Incorrect MC2f08_4cd4
Your lab partner is trying again (eye roll).
Scenario: ANOVA (five years of Shannon diversity)
Ecologists measure Shannon Diversity Index at the same set of sites across five years (1994, 2004, 2009, 2014, 2024).
Research question: Are any of the group means different?
They wrote the hypotheses below:
H0: At least one group mean is different.
In words: At least one group mean is different.
HA: All group means are equal.
In words: All group means are equal.
What is the main problem with their hypotheses?
They swapped the null and alternative hypotheses. Correct They wrote the null hypothesis as an inequality (the null should include equality). Incorrect They used sample statistics (like x̄ or s2) instead of population parameters. Incorrect Nothing is wrong; the hypotheses are stated correctly. Incorrect MCde97_ebe5
Your lab partner is trying again (eye roll).
Scenario: Two-sample mean test (Shannon diversity 2014 vs 2024)
Ecologists compare Shannon Diversity Index measurements taken at the same set of sites in 2014 and 2024.
Research question: Are the 2014 and 2024 values different?
They wrote the hypotheses below:
H0: μ2014 (mu_2014) ≠ μ2024 (mu_2024)
In words: The mean Shannon Diversity Index values in 2014 and 2024 are different.
HA: μ2014 (mu_2014) = μ2024 (mu_2024)
In words: The mean Shannon Diversity Index values in 2014 and 2024 are equal.
What is the main problem with their hypotheses?
They swapped the null and alternative hypotheses. Correct They used sample statistics (like x̄ or s2) instead of population parameters. Incorrect They wrote the null hypothesis as an inequality (the null should include equality). Incorrect Nothing is wrong; the hypotheses are stated correctly. Incorrect MC1ed2_6058
Your lab partner is trying again (eye roll).
Scenario: One-sample mean test (baby weights)
Joe's Hospital of Fried Foods claims their newborns are heavier than the national average.
The national average birth weight is 7.5 lbs.
Research question: Is the mean higher than 7.5 lbs?
They wrote the hypotheses below:
H0: μhospital (mu_hospital) = 7.5
In words: The hospital mean birth weight equals 7.5 lbs.
HA: μhospital (mu_hospital) > 7.5
In words: The hospital mean birth weight is greater than 7.5 lbs.
What is the main problem with their hypotheses?
They used sample statistics (like x̄ or s2) instead of population parameters. Incorrect They wrote the null hypothesis as an inequality (the null should include equality). Incorrect Nothing is wrong; the hypotheses are stated correctly. Correct They swapped the null and alternative hypotheses. Incorrect MC41ba_749e
Your lab partner is trying again (eye roll).
Scenario: Two-sample mean test (Shannon diversity 2014 vs 2024)
Ecologists compare Shannon Diversity Index measurements taken at the same set of sites in 2014 and 2024.
Research question: Is the 2024 value smaller than the 2014 value?
They wrote the hypotheses below:
H0: μ2024 (mu_2024) < μ2014 (mu_2014)
In words: The mean Shannon Diversity Index value in 2024 is less than the value in 2014.
HA: μ2014 (mu_2014) = μ2024 (mu_2024)
In words: The mean Shannon Diversity Index values in 2014 and 2024 are equal.
What is the main problem with their hypotheses?
They wrote the null hypothesis as an inequality (the null should include equality). Incorrect Nothing is wrong; the hypotheses are stated correctly. Incorrect They used sample statistics (like x̄ or s2) instead of population parameters. Incorrect They swapped the null and alternative hypotheses. Correct MCbfcf_88e3
Your lab partner is trying again (eye roll).
Scenario: Two-sample variance test (F test)
Ecologists want to know whether the variability of Shannon Diversity Index measurements changed between 2014 and 2024.
Research question: Is the 2024 value smaller than the 2014 value?
They wrote the hypotheses below:
H0: σ20242 (sigma^2_2024) < σ20142 (sigma^2_2014)
In words: The variance Shannon Diversity Index value in 2024 is less than the value in 2014.
HA: σ20142 (sigma^2_2014) = σ20242 (sigma^2_2024)
In words: The variance Shannon Diversity Index values in 2014 and 2024 are equal.
What is the main problem with their hypotheses?
They used sample statistics (like x̄ or s2) instead of population parameters. Incorrect They wrote the null hypothesis as an inequality (the null should include equality). Incorrect They swapped the null and alternative hypotheses. Correct Nothing is wrong; the hypotheses are stated correctly. Incorrect MC5a97_ab9c
Your lab partner is trying again (eye roll).
Scenario: Two-sample variance test (F test)
Ecologists want to know whether the variability of Shannon Diversity Index measurements changed between 2014 and 2024.
Research question: Is the 2024 value larger than the 2014 value?
They wrote the hypotheses below:
H0: s20142 (s2_2014) = s20242 (s2_2024)
In words: The variance Shannon Diversity Index values in 2014 and 2024 are equal.
HA: s20242 (s2_2024) > s20142 (s2_2014)
In words: The variance Shannon Diversity Index value in 2024 is greater than the value in 2014.
What is the main problem with their hypotheses?
They wrote the null hypothesis as an inequality (the null should include equality). Incorrect They swapped the null and alternative hypotheses. Incorrect Nothing is wrong; the hypotheses are stated correctly. Incorrect They used sample statistics (like x̄ or s2) instead of population parameters. Correct MC373a_d028
Your lab partner is trying again (eye roll).
Scenario: Two-sample variance test (F test)
Ecologists want to know whether the variability of Shannon Diversity Index measurements changed between 2014 and 2024.
Research question: Is the 2024 value smaller than the 2014 value?
They wrote the hypotheses below:
H0: s20142 (s2_2014) = s20242 (s2_2024)
In words: The variance Shannon Diversity Index values in 2014 and 2024 are equal.
HA: s20242 (s2_2024) < s20142 (s2_2014)
In words: The variance Shannon Diversity Index value in 2024 is less than the value in 2014.
What is the main problem with their hypotheses?
They used sample statistics (like x̄ or s2) instead of population parameters. Correct They swapped the null and alternative hypotheses. Incorrect They wrote the null hypothesis as an inequality (the null should include equality). Incorrect Nothing is wrong; the hypotheses are stated correctly. Incorrect MC4cb3_a637
Your lab partner is trying again (eye roll).
Scenario: One-sample mean test (baby weights)
Joe's Hospital of Fried Foods claims their newborns are heavier than the national average.
The national average birth weight is 7.5 lbs.
Research question: Is the mean lower than 7.5 lbs?
They wrote the hypotheses below:
H0: x̄hospital (xbar_hospital) = 7.5
In words: The hospital mean birth weight equals 7.5 lbs.
HA: x̄hospital (xbar_hospital) < 7.5
In words: The hospital mean birth weight is less than 7.5 lbs.
What is the main problem with their hypotheses?
They used sample statistics (like x̄ or s2) instead of population parameters. Correct Nothing is wrong; the hypotheses are stated correctly. Incorrect They wrote the null hypothesis as an inequality (the null should include equality). Incorrect They swapped the null and alternative hypotheses. Incorrect MC0db2_a637
Your lab partner is trying again (eye roll).
Scenario: Two-sample variance test (F test)
Ecologists want to know whether the variability of Shannon Diversity Index measurements changed between 2014 and 2024.
Research question: Is the 2024 value larger than the 2014 value?
They wrote the hypotheses below:
H0: σ20142 (sigma^2_2014) = σ20242 (sigma^2_2024)
In words: The variance Shannon Diversity Index values in 2014 and 2024 are equal.
HA: σ20242 (sigma^2_2024) > σ20142 (sigma^2_2014)
In words: The variance Shannon Diversity Index value in 2024 is greater than the value in 2014.
What is the main problem with their hypotheses?
They used sample statistics (like x̄ or s2) instead of population parameters. Incorrect Nothing is wrong; the hypotheses are stated correctly. Correct They wrote the null hypothesis as an inequality (the null should include equality). Incorrect They swapped the null and alternative hypotheses. Incorrect MC5ff2_749e
Your lab partner is trying again (eye roll).
Scenario: Two-sample variance test (F test)
Ecologists want to know whether the variability of Shannon Diversity Index measurements changed between 2014 and 2024.
Research question: Are the 2014 and 2024 values different?
They wrote the hypotheses below:
H0: σ20142 (sigma^2_2014) ≠ σ20242 (sigma^2_2024)
In words: The variance Shannon Diversity Index values in 2014 and 2024 are different.
HA: σ20142 (sigma^2_2014) = σ20242 (sigma^2_2024)
In words: The variance Shannon Diversity Index values in 2014 and 2024 are equal.
What is the main problem with their hypotheses?
They wrote the null hypothesis as an inequality (the null should include equality). Correct Nothing is wrong; the hypotheses are stated correctly. Incorrect They used sample statistics (like x̄ or s2) instead of population parameters. Incorrect They swapped the null and alternative hypotheses. Incorrect MCab50_61d2
Your lab partner is trying again (eye roll).
Scenario: Two-sample variance test (F test)
Ecologists want to know whether the variability of Shannon Diversity Index measurements changed between 2014 and 2024.
Research question: Is the 2024 value larger than the 2014 value?
They wrote the hypotheses below:
H0: σ20242 (sigma^2_2024) > σ20142 (sigma^2_2014)
In words: The variance Shannon Diversity Index value in 2024 is greater than the value in 2014.
HA: σ20142 (sigma^2_2014) = σ20242 (sigma^2_2024)
In words: The variance Shannon Diversity Index values in 2014 and 2024 are equal.
What is the main problem with their hypotheses?
They wrote the null hypothesis as an inequality (the null should include equality). Incorrect Nothing is wrong; the hypotheses are stated correctly. Incorrect They swapped the null and alternative hypotheses. Correct They used sample statistics (like x̄ or s2) instead of population parameters. Incorrect MC9df1_f8be
Your lab partner is trying again (eye roll).
Scenario: ANOVA (five years of Shannon diversity)
Ecologists measure Shannon Diversity Index at the same set of sites across five years (1994, 2004, 2009, 2014, 2024).
Research question: Are any of the group means different?
They wrote the hypotheses below:
H0: All group means are equal.
In words: All group means are equal.
HA: At least one group mean is different.
In words: At least one group mean is different.
What is the main problem with their hypotheses?
Nothing is wrong; the hypotheses are stated correctly. Correct They wrote the null hypothesis as an inequality (the null should include equality). Incorrect They used sample statistics (like x̄ or s2) instead of population parameters. Incorrect They swapped the null and alternative hypotheses. Incorrect MC9df1_ab9c
Your lab partner is trying again (eye roll).
Scenario: ANOVA (five years of Shannon diversity)
Ecologists measure Shannon Diversity Index at the same set of sites across five years (1994, 2004, 2009, 2014, 2024).
Research question: Are any of the group means different?
They wrote the hypotheses below:
H0: All group means are equal.
In words: All group means are equal.
HA: At least one group mean is different.
In words: At least one group mean is different.
What is the main problem with their hypotheses?
They wrote the null hypothesis as an inequality (the null should include equality). Incorrect They swapped the null and alternative hypotheses. Incorrect Nothing is wrong; the hypotheses are stated correctly. Correct They used sample statistics (like x̄ or s2) instead of population parameters. Incorrect MCde97_4294
Your lab partner is trying again (eye roll).
Scenario: Two-sample mean test (Shannon diversity 2014 vs 2024)
Ecologists compare Shannon Diversity Index measurements taken at the same set of sites in 2014 and 2024.
Research question: Are the 2014 and 2024 values different?
They wrote the hypotheses below:
H0: μ2014 (mu_2014) ≠ μ2024 (mu_2024)
In words: The mean Shannon Diversity Index values in 2014 and 2024 are different.
HA: μ2014 (mu_2014) = μ2024 (mu_2024)
In words: The mean Shannon Diversity Index values in 2014 and 2024 are equal.
What is the main problem with their hypotheses?
Nothing is wrong; the hypotheses are stated correctly. Incorrect They swapped the null and alternative hypotheses. Correct They wrote the null hypothesis as an inequality (the null should include equality). Incorrect They used sample statistics (like x̄ or s2) instead of population parameters. Incorrect MC9df1_ebe5
Your lab partner is trying again (eye roll).
Scenario: ANOVA (five years of Shannon diversity)
Ecologists measure Shannon Diversity Index at the same set of sites across five years (1994, 2004, 2009, 2014, 2024).
Research question: Are any of the group means different?
They wrote the hypotheses below:
H0: All group means are equal.
In words: All group means are equal.
HA: At least one group mean is different.
In words: At least one group mean is different.
What is the main problem with their hypotheses?
They swapped the null and alternative hypotheses. Incorrect They used sample statistics (like x̄ or s2) instead of population parameters. Incorrect They wrote the null hypothesis as an inequality (the null should include equality). Incorrect Nothing is wrong; the hypotheses are stated correctly. Correct MC2f08_a637
Your lab partner is trying again (eye roll).
Scenario: ANOVA (five years of Shannon diversity)
Ecologists measure Shannon Diversity Index at the same set of sites across five years (1994, 2004, 2009, 2014, 2024).
Research question: Are any of the group means different?
They wrote the hypotheses below:
H0: At least one group mean is different.
In words: At least one group mean is different.
HA: All group means are equal.
In words: All group means are equal.
What is the main problem with their hypotheses?
They used sample statistics (like x̄ or s2) instead of population parameters. Incorrect Nothing is wrong; the hypotheses are stated correctly. Incorrect They wrote the null hypothesis as an inequality (the null should include equality). Incorrect They swapped the null and alternative hypotheses. Correct MC1c84_d028
Your lab partner is trying again (eye roll).
Scenario: One-sample mean test (baby weights)
Joe's Hospital of Fried Foods claims their newborns are heavier than the national average.
The national average birth weight is 7.5 lbs.
Research question: Is the mean higher than 7.5 lbs?
They wrote the hypotheses below:
H0: μhospital (mu_hospital) > 7.5
In words: The hospital mean birth weight is greater than 7.5 lbs.
HA: μhospital (mu_hospital) ≤ 7.5
In words: The hospital mean birth weight is less than or equal to 7.5 lbs.
What is the main problem with their hypotheses?
They used sample statistics (like x̄ or s2) instead of population parameters. Incorrect They swapped the null and alternative hypotheses. Incorrect They wrote the null hypothesis as an inequality (the null should include equality). Correct Nothing is wrong; the hypotheses are stated correctly. Incorrect MCa6e0_d1dc
Your lab partner is trying again (eye roll).
Scenario: Two-sample mean test (Shannon diversity 2014 vs 2024)
Ecologists compare Shannon Diversity Index measurements taken at the same set of sites in 2014 and 2024.
Research question: Is the 2024 value smaller than the 2014 value?
They wrote the hypotheses below:
H0: μ2024 (mu_2024) < μ2014 (mu_2014)
In words: The mean Shannon Diversity Index value in 2024 is less than the value in 2014.
HA: μ2024 (mu_2024) ≥ μ2014 (mu_2014)
In words: The mean Shannon Diversity Index value in 2024 is greater than or equal to the value in 2014.
What is the main problem with their hypotheses?
They swapped the null and alternative hypotheses. Incorrect Nothing is wrong; the hypotheses are stated correctly. Incorrect They used sample statistics (like x̄ or s2) instead of population parameters. Incorrect They wrote the null hypothesis as an inequality (the null should include equality). Correct MC1c84_cfa8
Your lab partner is trying again (eye roll).
Scenario: One-sample mean test (baby weights)
Joe's Hospital of Fried Foods claims their newborns are heavier than the national average.
The national average birth weight is 7.5 lbs.
Research question: Is the mean higher than 7.5 lbs?
They wrote the hypotheses below:
H0: μhospital (mu_hospital) > 7.5
In words: The hospital mean birth weight is greater than 7.5 lbs.
HA: μhospital (mu_hospital) ≤ 7.5
In words: The hospital mean birth weight is less than or equal to 7.5 lbs.
What is the main problem with their hypotheses?
They wrote the null hypothesis as an inequality (the null should include equality). Correct They used sample statistics (like x̄ or s2) instead of population parameters. Incorrect Nothing is wrong; the hypotheses are stated correctly. Incorrect They swapped the null and alternative hypotheses. Incorrect MC7ca0_4294
Your lab partner is trying again (eye roll).
Scenario: One-sample mean test (baby weights)
Joe's Hospital of Fried Foods claims their newborns are heavier than the national average.
The national average birth weight is 7.5 lbs.
Research question: Is the mean different from 7.5 lbs?
They wrote the hypotheses below:
H0: x̄hospital (xbar_hospital) = 7.5
In words: The hospital mean birth weight equals 7.5 lbs.
HA: x̄hospital (xbar_hospital) ≠ 7.5
In words: The hospital mean birth weight is different from 7.5 lbs.
What is the main problem with their hypotheses?
Nothing is wrong; the hypotheses are stated correctly. Incorrect They swapped the null and alternative hypotheses. Incorrect They wrote the null hypothesis as an inequality (the null should include equality). Incorrect They used sample statistics (like x̄ or s2) instead of population parameters. Correct MC7342_4cd4
Your lab partner is trying again (eye roll).
Scenario: Two-sample mean test (Shannon diversity 2014 vs 2024)
Ecologists compare Shannon Diversity Index measurements taken at the same set of sites in 2014 and 2024.
Research question: Is the 2024 value larger than the 2014 value?
They wrote the hypotheses below:
H0: x̄2014 (xbar_2014) = x̄2024 (xbar_2024)
In words: The mean Shannon Diversity Index values in 2014 and 2024 are equal.
HA: x̄2024 (xbar_2024) > x̄2014 (xbar_2014)
In words: The mean Shannon Diversity Index value in 2024 is greater than the value in 2014.
What is the main problem with their hypotheses?
They swapped the null and alternative hypotheses. Incorrect They wrote the null hypothesis as an inequality (the null should include equality). Incorrect They used sample statistics (like x̄ or s2) instead of population parameters. Correct Nothing is wrong; the hypotheses are stated correctly. Incorrect MC5a97_d1dc
Your lab partner is trying again (eye roll).
Scenario: Two-sample variance test (F test)
Ecologists want to know whether the variability of Shannon Diversity Index measurements changed between 2014 and 2024.
Research question: Is the 2024 value larger than the 2014 value?
They wrote the hypotheses below:
H0: s20142 (s2_2014) = s20242 (s2_2024)
In words: The variance Shannon Diversity Index values in 2014 and 2024 are equal.
HA: s20242 (s2_2024) > s20142 (s2_2014)
In words: The variance Shannon Diversity Index value in 2024 is greater than the value in 2014.
What is the main problem with their hypotheses?
They swapped the null and alternative hypotheses. Incorrect Nothing is wrong; the hypotheses are stated correctly. Incorrect They used sample statistics (like x̄ or s2) instead of population parameters. Correct They wrote the null hypothesis as an inequality (the null should include equality). Incorrect MCde97_f8be
Your lab partner is trying again (eye roll).
Scenario: Two-sample mean test (Shannon diversity 2014 vs 2024)
Ecologists compare Shannon Diversity Index measurements taken at the same set of sites in 2014 and 2024.
Research question: Are the 2014 and 2024 values different?
They wrote the hypotheses below:
H0: μ2014 (mu_2014) ≠ μ2024 (mu_2024)
In words: The mean Shannon Diversity Index values in 2014 and 2024 are different.
HA: μ2014 (mu_2014) = μ2024 (mu_2024)
In words: The mean Shannon Diversity Index values in 2014 and 2024 are equal.
What is the main problem with their hypotheses?
Nothing is wrong; the hypotheses are stated correctly. Incorrect They wrote the null hypothesis as an inequality (the null should include equality). Correct They used sample statistics (like x̄ or s2) instead of population parameters. Incorrect They swapped the null and alternative hypotheses. Incorrect MC4f68_ebe5
Your lab partner is trying again (eye roll).
Scenario: One-sample mean test (baby weights)
Joe's Hospital of Fried Foods claims their newborns are heavier than the national average.
The national average birth weight is 7.5 lbs.
Research question: Is the mean lower than 7.5 lbs?
They wrote the hypotheses below:
H0: μhospital (mu_hospital) < 7.5
In words: The hospital mean birth weight is less than 7.5 lbs.
HA: μhospital (mu_hospital) = 7.5
In words: The hospital mean birth weight equals 7.5 lbs.
What is the main problem with their hypotheses?
They swapped the null and alternative hypotheses. Correct They used sample statistics (like x̄ or s2) instead of population parameters. Incorrect They wrote the null hypothesis as an inequality (the null should include equality). Incorrect Nothing is wrong; the hypotheses are stated correctly. Incorrect MC4f68_4cd4
Your lab partner is trying again (eye roll).
Scenario: One-sample mean test (baby weights)
Joe's Hospital of Fried Foods claims their newborns are heavier than the national average.
The national average birth weight is 7.5 lbs.
Research question: Is the mean lower than 7.5 lbs?
They wrote the hypotheses below:
H0: μhospital (mu_hospital) < 7.5
In words: The hospital mean birth weight is less than 7.5 lbs.
HA: μhospital (mu_hospital) = 7.5
In words: The hospital mean birth weight equals 7.5 lbs.
What is the main problem with their hypotheses?
They swapped the null and alternative hypotheses. Correct They wrote the null hypothesis as an inequality (the null should include equality). Incorrect They used sample statistics (like x̄ or s2) instead of population parameters. Incorrect Nothing is wrong; the hypotheses are stated correctly. Incorrect MC1b81_4801
Your lab partner is trying again (eye roll).
Scenario: ANOVA (five years of Shannon diversity)
Ecologists measure Shannon Diversity Index at the same set of sites across five years (1994, 2004, 2009, 2014, 2024).
Research question: Are any of the group means different?
They wrote the hypotheses below:
H0: All sample means are equal.
In words: All sample means are equal.
HA: At least one sample mean is different.
In words: At least one sample mean is different.
What is the main problem with their hypotheses?
They used sample statistics (like x̄ or s2) instead of population parameters. Correct They swapped the null and alternative hypotheses. Incorrect Nothing is wrong; the hypotheses are stated correctly. Incorrect They wrote the null hypothesis as an inequality (the null should include equality). Incorrect MC5de4_4294
Your lab partner is trying again (eye roll).
Scenario: Two-sample mean test (Shannon diversity 2014 vs 2024)
Ecologists compare Shannon Diversity Index measurements taken at the same set of sites in 2014 and 2024.
Research question: Is the 2024 value larger than the 2014 value?
They wrote the hypotheses below:
H0: μ2024 (mu_2024) > μ2014 (mu_2014)
In words: The mean Shannon Diversity Index value in 2024 is greater than the value in 2014.
HA: μ2014 (mu_2014) = μ2024 (mu_2024)
In words: The mean Shannon Diversity Index values in 2014 and 2024 are equal.
What is the main problem with their hypotheses?
Nothing is wrong; the hypotheses are stated correctly. Incorrect They swapped the null and alternative hypotheses. Correct They wrote the null hypothesis as an inequality (the null should include equality). Incorrect They used sample statistics (like x̄ or s2) instead of population parameters. Incorrect MCd8bb_d665
Your lab partner is trying again (eye roll).
Scenario: Two-sample mean test (Shannon diversity 2014 vs 2024)
Ecologists compare Shannon Diversity Index measurements taken at the same set of sites in 2014 and 2024.
Research question: Is the 2024 value larger than the 2014 value?
They wrote the hypotheses below:
H0: μ2024 (mu_2024) > μ2014 (mu_2014)
In words: The mean Shannon Diversity Index value in 2024 is greater than the value in 2014.
HA: μ2024 (mu_2024) ≤ μ2014 (mu_2014)
In words: The mean Shannon Diversity Index value in 2024 is less than or equal to the value in 2014.
What is the main problem with their hypotheses?
They swapped the null and alternative hypotheses. Incorrect Nothing is wrong; the hypotheses are stated correctly. Incorrect They wrote the null hypothesis as an inequality (the null should include equality). Correct They used sample statistics (like x̄ or s2) instead of population parameters. Incorrect MC3e1c_df6c
Your lab partner is trying again (eye roll).
Scenario: One-sample mean test (baby weights)
Joe's Hospital of Fried Foods claims their newborns are heavier than the national average.
The national average birth weight is 7.5 lbs.
Research question: Is the mean lower than 7.5 lbs?
They wrote the hypotheses below:
H0: μhospital (mu_hospital) < 7.5
In words: The hospital mean birth weight is less than 7.5 lbs.
HA: μhospital (mu_hospital) ≥ 7.5
In words: The hospital mean birth weight is greater than or equal to 7.5 lbs.
What is the main problem with their hypotheses?
They used sample statistics (like x̄ or s2) instead of population parameters. Incorrect Nothing is wrong; the hypotheses are stated correctly. Incorrect They swapped the null and alternative hypotheses. Incorrect They wrote the null hypothesis as an inequality (the null should include equality). Correct MC7f90_73cc
Your lab partner is trying again (eye roll).
Scenario: One-sample mean test (baby weights)
Joe's Hospital of Fried Foods claims their newborns are heavier than the national average.
The national average birth weight is 7.5 lbs.
Research question: Is the mean different from 7.5 lbs?
They wrote the hypotheses below:
H0: μhospital (mu_hospital) = 7.5
In words: The hospital mean birth weight equals 7.5 lbs.
HA: μhospital (mu_hospital) ≠ 7.5
In words: The hospital mean birth weight is different from 7.5 lbs.
What is the main problem with their hypotheses?
They swapped the null and alternative hypotheses. Incorrect They used sample statistics (like x̄ or s2) instead of population parameters. Incorrect Nothing is wrong; the hypotheses are stated correctly. Correct They wrote the null hypothesis as an inequality (the null should include equality). Incorrect MC7f90_749e
Your lab partner is trying again (eye roll).
Scenario: One-sample mean test (baby weights)
Joe's Hospital of Fried Foods claims their newborns are heavier than the national average.
The national average birth weight is 7.5 lbs.
Research question: Is the mean different from 7.5 lbs?
They wrote the hypotheses below:
H0: μhospital (mu_hospital) = 7.5
In words: The hospital mean birth weight equals 7.5 lbs.
HA: μhospital (mu_hospital) ≠ 7.5
In words: The hospital mean birth weight is different from 7.5 lbs.
What is the main problem with their hypotheses?
They wrote the null hypothesis as an inequality (the null should include equality). Incorrect Nothing is wrong; the hypotheses are stated correctly. Correct They used sample statistics (like x̄ or s2) instead of population parameters. Incorrect They swapped the null and alternative hypotheses. Incorrect MCde97_5ac7
Your lab partner is trying again (eye roll).
Scenario: Two-sample mean test (Shannon diversity 2014 vs 2024)
Ecologists compare Shannon Diversity Index measurements taken at the same set of sites in 2014 and 2024.
Research question: Are the 2014 and 2024 values different?
They wrote the hypotheses below:
H0: μ2014 (mu_2014) ≠ μ2024 (mu_2024)
In words: The mean Shannon Diversity Index values in 2014 and 2024 are different.
HA: μ2014 (mu_2014) = μ2024 (mu_2024)
In words: The mean Shannon Diversity Index values in 2014 and 2024 are equal.
What is the main problem with their hypotheses?
They wrote the null hypothesis as an inequality (the null should include equality). Incorrect They swapped the null and alternative hypotheses. Correct They used sample statistics (like x̄ or s2) instead of population parameters. Incorrect Nothing is wrong; the hypotheses are stated correctly. Incorrect MC7ca0_61d2
Your lab partner is trying again (eye roll).
Scenario: One-sample mean test (baby weights)
Joe's Hospital of Fried Foods claims their newborns are heavier than the national average.
The national average birth weight is 7.5 lbs.
Research question: Is the mean different from 7.5 lbs?
They wrote the hypotheses below:
H0: x̄hospital (xbar_hospital) = 7.5
In words: The hospital mean birth weight equals 7.5 lbs.
HA: x̄hospital (xbar_hospital) ≠ 7.5
In words: The hospital mean birth weight is different from 7.5 lbs.
What is the main problem with their hypotheses?
They wrote the null hypothesis as an inequality (the null should include equality). Incorrect Nothing is wrong; the hypotheses are stated correctly. Incorrect They swapped the null and alternative hypotheses. Incorrect They used sample statistics (like x̄ or s2) instead of population parameters. Correct MC7ca0_f8be
Your lab partner is trying again (eye roll).
Scenario: One-sample mean test (baby weights)
Joe's Hospital of Fried Foods claims their newborns are heavier than the national average.
The national average birth weight is 7.5 lbs.
Research question: Is the mean different from 7.5 lbs?
They wrote the hypotheses below:
H0: x̄hospital (xbar_hospital) = 7.5
In words: The hospital mean birth weight equals 7.5 lbs.
HA: x̄hospital (xbar_hospital) ≠ 7.5
In words: The hospital mean birth weight is different from 7.5 lbs.
What is the main problem with their hypotheses?
Nothing is wrong; the hypotheses are stated correctly. Incorrect They wrote the null hypothesis as an inequality (the null should include equality). Incorrect They used sample statistics (like x̄ or s2) instead of population parameters. Correct They swapped the null and alternative hypotheses. Incorrect MCd8bb_73cc
Your lab partner is trying again (eye roll).
Scenario: Two-sample mean test (Shannon diversity 2014 vs 2024)
Ecologists compare Shannon Diversity Index measurements taken at the same set of sites in 2014 and 2024.
Research question: Is the 2024 value larger than the 2014 value?
They wrote the hypotheses below:
H0: μ2024 (mu_2024) > μ2014 (mu_2014)
In words: The mean Shannon Diversity Index value in 2024 is greater than the value in 2014.
HA: μ2024 (mu_2024) ≤ μ2014 (mu_2014)
In words: The mean Shannon Diversity Index value in 2024 is less than or equal to the value in 2014.
What is the main problem with their hypotheses?
They swapped the null and alternative hypotheses. Incorrect They used sample statistics (like x̄ or s2) instead of population parameters. Incorrect Nothing is wrong; the hypotheses are stated correctly. Incorrect They wrote the null hypothesis as an inequality (the null should include equality). Correct MC41ba_a637
Your lab partner is trying again (eye roll).
Scenario: Two-sample mean test (Shannon diversity 2014 vs 2024)
Ecologists compare Shannon Diversity Index measurements taken at the same set of sites in 2014 and 2024.
Research question: Is the 2024 value smaller than the 2014 value?
They wrote the hypotheses below:
H0: μ2024 (mu_2024) < μ2014 (mu_2014)
In words: The mean Shannon Diversity Index value in 2024 is less than the value in 2014.
HA: μ2014 (mu_2014) = μ2024 (mu_2024)
In words: The mean Shannon Diversity Index values in 2014 and 2024 are equal.
What is the main problem with their hypotheses?
They used sample statistics (like x̄ or s2) instead of population parameters. Incorrect Nothing is wrong; the hypotheses are stated correctly. Incorrect They wrote the null hypothesis as an inequality (the null should include equality). Incorrect They swapped the null and alternative hypotheses. Correct MC1c84_ab9c
Your lab partner is trying again (eye roll).
Scenario: One-sample mean test (baby weights)
Joe's Hospital of Fried Foods claims their newborns are heavier than the national average.
The national average birth weight is 7.5 lbs.
Research question: Is the mean higher than 7.5 lbs?
They wrote the hypotheses below:
H0: μhospital (mu_hospital) > 7.5
In words: The hospital mean birth weight is greater than 7.5 lbs.
HA: μhospital (mu_hospital) ≤ 7.5
In words: The hospital mean birth weight is less than or equal to 7.5 lbs.
What is the main problem with their hypotheses?
They wrote the null hypothesis as an inequality (the null should include equality). Correct They swapped the null and alternative hypotheses. Incorrect Nothing is wrong; the hypotheses are stated correctly. Incorrect They used sample statistics (like x̄ or s2) instead of population parameters. Incorrect MC4cb3_215b
Your lab partner is trying again (eye roll).
Scenario: One-sample mean test (baby weights)
Joe's Hospital of Fried Foods claims their newborns are heavier than the national average.
The national average birth weight is 7.5 lbs.
Research question: Is the mean lower than 7.5 lbs?
They wrote the hypotheses below:
H0: x̄hospital (xbar_hospital) = 7.5
In words: The hospital mean birth weight equals 7.5 lbs.
HA: x̄hospital (xbar_hospital) < 7.5
In words: The hospital mean birth weight is less than 7.5 lbs.
What is the main problem with their hypotheses?
Nothing is wrong; the hypotheses are stated correctly. Incorrect They used sample statistics (like x̄ or s2) instead of population parameters. Correct They wrote the null hypothesis as an inequality (the null should include equality). Incorrect They swapped the null and alternative hypotheses. Incorrect MC1ed2_d665
Your lab partner is trying again (eye roll).
Scenario: One-sample mean test (baby weights)
Joe's Hospital of Fried Foods claims their newborns are heavier than the national average.
The national average birth weight is 7.5 lbs.
Research question: Is the mean higher than 7.5 lbs?
They wrote the hypotheses below:
H0: μhospital (mu_hospital) = 7.5
In words: The hospital mean birth weight equals 7.5 lbs.
HA: μhospital (mu_hospital) > 7.5
In words: The hospital mean birth weight is greater than 7.5 lbs.
What is the main problem with their hypotheses?
They swapped the null and alternative hypotheses. Incorrect Nothing is wrong; the hypotheses are stated correctly. Correct They wrote the null hypothesis as an inequality (the null should include equality). Incorrect They used sample statistics (like x̄ or s2) instead of population parameters. Incorrect MC41ba_d028
Your lab partner is trying again (eye roll).
Scenario: Two-sample mean test (Shannon diversity 2014 vs 2024)
Ecologists compare Shannon Diversity Index measurements taken at the same set of sites in 2014 and 2024.
Research question: Is the 2024 value smaller than the 2014 value?
They wrote the hypotheses below:
H0: μ2024 (mu_2024) < μ2014 (mu_2014)
In words: The mean Shannon Diversity Index value in 2024 is less than the value in 2014.
HA: μ2014 (mu_2014) = μ2024 (mu_2024)
In words: The mean Shannon Diversity Index values in 2014 and 2024 are equal.
What is the main problem with their hypotheses?
They used sample statistics (like x̄ or s2) instead of population parameters. Incorrect They swapped the null and alternative hypotheses. Correct They wrote the null hypothesis as an inequality (the null should include equality). Incorrect Nothing is wrong; the hypotheses are stated correctly. Incorrect MC621d_d1dc
Your lab partner is trying again (eye roll).
Scenario: Two-sample mean test (Shannon diversity 2014 vs 2024)
Ecologists compare Shannon Diversity Index measurements taken at the same set of sites in 2014 and 2024.
Research question: Are the 2014 and 2024 values different?
They wrote the hypotheses below:
H0: μ2014 (mu_2014) = μ2024 (mu_2024)
In words: The mean Shannon Diversity Index values in 2014 and 2024 are equal.
HA: μ2014 (mu_2014) ≠ μ2024 (mu_2024)
In words: The mean Shannon Diversity Index values in 2014 and 2024 are different.
What is the main problem with their hypotheses?
They swapped the null and alternative hypotheses. Incorrect Nothing is wrong; the hypotheses are stated correctly. Correct They used sample statistics (like x̄ or s2) instead of population parameters. Incorrect They wrote the null hypothesis as an inequality (the null should include equality). Incorrect MCbfcf_749e
Your lab partner is trying again (eye roll).
Scenario: Two-sample variance test (F test)
Ecologists want to know whether the variability of Shannon Diversity Index measurements changed between 2014 and 2024.
Research question: Is the 2024 value smaller than the 2014 value?
They wrote the hypotheses below:
H0: σ20242 (sigma^2_2024) < σ20142 (sigma^2_2014)
In words: The variance Shannon Diversity Index value in 2024 is less than the value in 2014.
HA: σ20142 (sigma^2_2014) = σ20242 (sigma^2_2024)
In words: The variance Shannon Diversity Index values in 2014 and 2024 are equal.
What is the main problem with their hypotheses?
They wrote the null hypothesis as an inequality (the null should include equality). Incorrect Nothing is wrong; the hypotheses are stated correctly. Incorrect They used sample statistics (like x̄ or s2) instead of population parameters. Incorrect They swapped the null and alternative hypotheses. Correct MC60e9_73cc
Your lab partner is trying again (eye roll).
Scenario: Two-sample variance test (F test)
Ecologists want to know whether the variability of Shannon Diversity Index measurements changed between 2014 and 2024.
Research question: Is the 2024 value smaller than the 2014 value?
They wrote the hypotheses below:
H0: σ20242 (sigma^2_2024) < σ20142 (sigma^2_2014)
In words: The variance Shannon Diversity Index value in 2024 is less than the value in 2014.
HA: σ20242 (sigma^2_2024) ≥ σ20142 (sigma^2_2014)
In words: The variance Shannon Diversity Index value in 2024 is greater than or equal to the value in 2014.
What is the main problem with their hypotheses?
They swapped the null and alternative hypotheses. Incorrect They used sample statistics (like x̄ or s2) instead of population parameters. Incorrect Nothing is wrong; the hypotheses are stated correctly. Incorrect They wrote the null hypothesis as an inequality (the null should include equality). Correct MC41ba_f8be
Your lab partner is trying again (eye roll).
Scenario: Two-sample mean test (Shannon diversity 2014 vs 2024)
Ecologists compare Shannon Diversity Index measurements taken at the same set of sites in 2014 and 2024.
Research question: Is the 2024 value smaller than the 2014 value?
They wrote the hypotheses below:
H0: μ2024 (mu_2024) < μ2014 (mu_2014)
In words: The mean Shannon Diversity Index value in 2024 is less than the value in 2014.
HA: μ2014 (mu_2014) = μ2024 (mu_2024)
In words: The mean Shannon Diversity Index values in 2014 and 2024 are equal.
What is the main problem with their hypotheses?
Nothing is wrong; the hypotheses are stated correctly. Incorrect They wrote the null hypothesis as an inequality (the null should include equality). Incorrect They used sample statistics (like x̄ or s2) instead of population parameters. Incorrect They swapped the null and alternative hypotheses. Correct MCad0c_452d
Your lab partner is trying again (eye roll).
Scenario: Two-sample variance test (F test)
Ecologists want to know whether the variability of Shannon Diversity Index measurements changed between 2014 and 2024.
Research question: Is the 2024 value smaller than the 2014 value?
They wrote the hypotheses below:
H0: σ20142 (sigma^2_2014) = σ20242 (sigma^2_2024)
In words: The variance Shannon Diversity Index values in 2014 and 2024 are equal.
HA: σ20242 (sigma^2_2024) < σ20142 (sigma^2_2014)
In words: The variance Shannon Diversity Index value in 2024 is less than the value in 2014.
What is the main problem with their hypotheses?
Nothing is wrong; the hypotheses are stated correctly. Correct They swapped the null and alternative hypotheses. Incorrect They used sample statistics (like x̄ or s2) instead of population parameters. Incorrect They wrote the null hypothesis as an inequality (the null should include equality). Incorrect MC5de4_4801
Your lab partner is trying again (eye roll).
Scenario: Two-sample mean test (Shannon diversity 2014 vs 2024)
Ecologists compare Shannon Diversity Index measurements taken at the same set of sites in 2014 and 2024.
Research question: Is the 2024 value larger than the 2014 value?
They wrote the hypotheses below:
H0: μ2024 (mu_2024) > μ2014 (mu_2014)
In words: The mean Shannon Diversity Index value in 2024 is greater than the value in 2014.
HA: μ2014 (mu_2014) = μ2024 (mu_2024)
In words: The mean Shannon Diversity Index values in 2014 and 2024 are equal.
What is the main problem with their hypotheses?
They used sample statistics (like x̄ or s2) instead of population parameters. Incorrect They swapped the null and alternative hypotheses. Correct Nothing is wrong; the hypotheses are stated correctly. Incorrect They wrote the null hypothesis as an inequality (the null should include equality). Incorrect MC1b81_73cc
Your lab partner is trying again (eye roll).
Scenario: ANOVA (five years of Shannon diversity)
Ecologists measure Shannon Diversity Index at the same set of sites across five years (1994, 2004, 2009, 2014, 2024).
Research question: Are any of the group means different?
They wrote the hypotheses below:
H0: All sample means are equal.
In words: All sample means are equal.
HA: At least one sample mean is different.
In words: At least one sample mean is different.
What is the main problem with their hypotheses?
They swapped the null and alternative hypotheses. Incorrect They used sample statistics (like x̄ or s2) instead of population parameters. Correct Nothing is wrong; the hypotheses are stated correctly. Incorrect They wrote the null hypothesis as an inequality (the null should include equality). Incorrect MC9df1_215b
Your lab partner is trying again (eye roll).
Scenario: ANOVA (five years of Shannon diversity)
Ecologists measure Shannon Diversity Index at the same set of sites across five years (1994, 2004, 2009, 2014, 2024).
Research question: Are any of the group means different?
They wrote the hypotheses below:
H0: All group means are equal.
In words: All group means are equal.
HA: At least one group mean is different.
In words: At least one group mean is different.
What is the main problem with their hypotheses?
Nothing is wrong; the hypotheses are stated correctly. Correct They used sample statistics (like x̄ or s2) instead of population parameters. Incorrect They wrote the null hypothesis as an inequality (the null should include equality). Incorrect They swapped the null and alternative hypotheses. Incorrect MC621d_73cc
Your lab partner is trying again (eye roll).
Scenario: Two-sample mean test (Shannon diversity 2014 vs 2024)
Ecologists compare Shannon Diversity Index measurements taken at the same set of sites in 2014 and 2024.
Research question: Are the 2014 and 2024 values different?
They wrote the hypotheses below:
H0: μ2014 (mu_2014) = μ2024 (mu_2024)
In words: The mean Shannon Diversity Index values in 2014 and 2024 are equal.
HA: μ2014 (mu_2014) ≠ μ2024 (mu_2024)
In words: The mean Shannon Diversity Index values in 2014 and 2024 are different.
What is the main problem with their hypotheses?
They swapped the null and alternative hypotheses. Incorrect They used sample statistics (like x̄ or s2) instead of population parameters. Incorrect Nothing is wrong; the hypotheses are stated correctly. Correct They wrote the null hypothesis as an inequality (the null should include equality). Incorrect MC955b_d1dc
Your lab partner is trying again (eye roll).
Scenario: Two-sample mean test (Shannon diversity 2014 vs 2024)
Ecologists compare Shannon Diversity Index measurements taken at the same set of sites in 2014 and 2024.
Research question: Is the 2024 value smaller than the 2014 value?
They wrote the hypotheses below:
H0: x̄2014 (xbar_2014) = x̄2024 (xbar_2024)
In words: The mean Shannon Diversity Index values in 2014 and 2024 are equal.
HA: x̄2024 (xbar_2024) < x̄2014 (xbar_2014)
In words: The mean Shannon Diversity Index value in 2024 is less than the value in 2014.
What is the main problem with their hypotheses?
They swapped the null and alternative hypotheses. Incorrect Nothing is wrong; the hypotheses are stated correctly. Incorrect They used sample statistics (like x̄ or s2) instead of population parameters. Correct They wrote the null hypothesis as an inequality (the null should include equality). Incorrect MCd73c_73cc
Your lab partner is trying again (eye roll).
Scenario: One-sample mean test (baby weights)
Joe's Hospital of Fried Foods claims their newborns are heavier than the national average.
The national average birth weight is 7.5 lbs.
Research question: Is the mean lower than 7.5 lbs?
They wrote the hypotheses below:
H0: μhospital (mu_hospital) = 7.5
In words: The hospital mean birth weight equals 7.5 lbs.
HA: μhospital (mu_hospital) < 7.5
In words: The hospital mean birth weight is less than 7.5 lbs.
What is the main problem with their hypotheses?
They swapped the null and alternative hypotheses. Incorrect They used sample statistics (like x̄ or s2) instead of population parameters. Incorrect Nothing is wrong; the hypotheses are stated correctly. Correct They wrote the null hypothesis as an inequality (the null should include equality). Incorrect MCe071_88e3
Your lab partner is trying again (eye roll).
Scenario: Two-sample variance test (F test)
Ecologists want to know whether the variability of Shannon Diversity Index measurements changed between 2014 and 2024.
Research question: Are the 2014 and 2024 values different?
They wrote the hypotheses below:
H0: s20142 (s2_2014) = s20242 (s2_2024)
In words: The variance Shannon Diversity Index values in 2014 and 2024 are equal.
HA: s20142 (s2_2014) ≠ s20242 (s2_2024)
In words: The variance Shannon Diversity Index values in 2014 and 2024 are different.
What is the main problem with their hypotheses?
They used sample statistics (like x̄ or s2) instead of population parameters. Correct They wrote the null hypothesis as an inequality (the null should include equality). Incorrect They swapped the null and alternative hypotheses. Incorrect Nothing is wrong; the hypotheses are stated correctly. Incorrect MC1ed2_a637
Your lab partner is trying again (eye roll).
Scenario: One-sample mean test (baby weights)
Joe's Hospital of Fried Foods claims their newborns are heavier than the national average.
The national average birth weight is 7.5 lbs.
Research question: Is the mean higher than 7.5 lbs?
They wrote the hypotheses below:
H0: μhospital (mu_hospital) = 7.5
In words: The hospital mean birth weight equals 7.5 lbs.
HA: μhospital (mu_hospital) > 7.5
In words: The hospital mean birth weight is greater than 7.5 lbs.
What is the main problem with their hypotheses?
They used sample statistics (like x̄ or s2) instead of population parameters. Incorrect Nothing is wrong; the hypotheses are stated correctly. Correct They wrote the null hypothesis as an inequality (the null should include equality). Incorrect They swapped the null and alternative hypotheses. Incorrect MC373a_4801
Your lab partner is trying again (eye roll).
Scenario: Two-sample variance test (F test)
Ecologists want to know whether the variability of Shannon Diversity Index measurements changed between 2014 and 2024.
Research question: Is the 2024 value smaller than the 2014 value?
They wrote the hypotheses below:
H0: s20142 (s2_2014) = s20242 (s2_2024)
In words: The variance Shannon Diversity Index values in 2014 and 2024 are equal.
HA: s20242 (s2_2024) < s20142 (s2_2014)
In words: The variance Shannon Diversity Index value in 2024 is less than the value in 2014.
What is the main problem with their hypotheses?
They used sample statistics (like x̄ or s2) instead of population parameters. Correct They swapped the null and alternative hypotheses. Incorrect Nothing is wrong; the hypotheses are stated correctly. Incorrect They wrote the null hypothesis as an inequality (the null should include equality). Incorrect MCbc47_f8be
Your lab partner is trying again (eye roll).
Scenario: Two-sample variance test (F test)
Ecologists want to know whether the variability of Shannon Diversity Index measurements changed between 2014 and 2024.
Research question: Are the 2014 and 2024 values different?
They wrote the hypotheses below:
H0: σ20142 (sigma^2_2014) = σ20242 (sigma^2_2024)
In words: The variance Shannon Diversity Index values in 2014 and 2024 are equal.
HA: σ20142 (sigma^2_2014) ≠ σ20242 (sigma^2_2024)
In words: The variance Shannon Diversity Index values in 2014 and 2024 are different.
What is the main problem with their hypotheses?
Nothing is wrong; the hypotheses are stated correctly. Correct They wrote the null hypothesis as an inequality (the null should include equality). Incorrect They used sample statistics (like x̄ or s2) instead of population parameters. Incorrect They swapped the null and alternative hypotheses. Incorrect MC9e8e_bd8f
Your lab partner is trying again (eye roll).
Scenario: One-sample mean test (baby weights)
Joe's Hospital of Fried Foods claims their newborns are heavier than the national average.
The national average birth weight is 7.5 lbs.
Research question: Is the mean different from 7.5 lbs?
They wrote the hypotheses below:
H0: μhospital (mu_hospital) ≠ 7.5
In words: The hospital mean birth weight is different from 7.5 lbs.
HA: μhospital (mu_hospital) = 7.5
In words: The hospital mean birth weight equals 7.5 lbs.
What is the main problem with their hypotheses?
They swapped the null and alternative hypotheses. Incorrect They wrote the null hypothesis as an inequality (the null should include equality). Correct Nothing is wrong; the hypotheses are stated correctly. Incorrect They used sample statistics (like x̄ or s2) instead of population parameters. Incorrect MC1b81_df6c
Your lab partner is trying again (eye roll).
Scenario: ANOVA (five years of Shannon diversity)
Ecologists measure Shannon Diversity Index at the same set of sites across five years (1994, 2004, 2009, 2014, 2024).
Research question: Are any of the group means different?
They wrote the hypotheses below:
H0: All sample means are equal.
In words: All sample means are equal.
HA: At least one sample mean is different.
In words: At least one sample mean is different.
What is the main problem with their hypotheses?
They used sample statistics (like x̄ or s2) instead of population parameters. Correct Nothing is wrong; the hypotheses are stated correctly. Incorrect They swapped the null and alternative hypotheses. Incorrect They wrote the null hypothesis as an inequality (the null should include equality). Incorrect MC7f90_d028
Your lab partner is trying again (eye roll).
Scenario: One-sample mean test (baby weights)
Joe's Hospital of Fried Foods claims their newborns are heavier than the national average.
The national average birth weight is 7.5 lbs.
Research question: Is the mean different from 7.5 lbs?
They wrote the hypotheses below:
H0: μhospital (mu_hospital) = 7.5
In words: The hospital mean birth weight equals 7.5 lbs.
HA: μhospital (mu_hospital) ≠ 7.5
In words: The hospital mean birth weight is different from 7.5 lbs.
What is the main problem with their hypotheses?
They used sample statistics (like x̄ or s2) instead of population parameters. Incorrect They swapped the null and alternative hypotheses. Incorrect They wrote the null hypothesis as an inequality (the null should include equality). Incorrect Nothing is wrong; the hypotheses are stated correctly. Correct MCad0c_f8be
Your lab partner is trying again (eye roll).
Scenario: Two-sample variance test (F test)
Ecologists want to know whether the variability of Shannon Diversity Index measurements changed between 2014 and 2024.
Research question: Is the 2024 value smaller than the 2014 value?
They wrote the hypotheses below:
H0: σ20142 (sigma^2_2014) = σ20242 (sigma^2_2024)
In words: The variance Shannon Diversity Index values in 2014 and 2024 are equal.
HA: σ20242 (sigma^2_2024) < σ20142 (sigma^2_2014)
In words: The variance Shannon Diversity Index value in 2024 is less than the value in 2014.
What is the main problem with their hypotheses?
Nothing is wrong; the hypotheses are stated correctly. Correct They wrote the null hypothesis as an inequality (the null should include equality). Incorrect They used sample statistics (like x̄ or s2) instead of population parameters. Incorrect They swapped the null and alternative hypotheses. Incorrect MC5a97_edf2
Your lab partner is trying again (eye roll).
Scenario: Two-sample variance test (F test)
Ecologists want to know whether the variability of Shannon Diversity Index measurements changed between 2014 and 2024.
Research question: Is the 2024 value larger than the 2014 value?
They wrote the hypotheses below:
H0: s20142 (s2_2014) = s20242 (s2_2024)
In words: The variance Shannon Diversity Index values in 2014 and 2024 are equal.
HA: s20242 (s2_2024) > s20142 (s2_2014)
In words: The variance Shannon Diversity Index value in 2024 is greater than the value in 2014.
What is the main problem with their hypotheses?
Nothing is wrong; the hypotheses are stated correctly. Incorrect They wrote the null hypothesis as an inequality (the null should include equality). Incorrect They swapped the null and alternative hypotheses. Incorrect They used sample statistics (like x̄ or s2) instead of population parameters. Correct MC1b81_ab9c
Your lab partner is trying again (eye roll).
Scenario: ANOVA (five years of Shannon diversity)
Ecologists measure Shannon Diversity Index at the same set of sites across five years (1994, 2004, 2009, 2014, 2024).
Research question: Are any of the group means different?
They wrote the hypotheses below:
H0: All sample means are equal.
In words: All sample means are equal.
HA: At least one sample mean is different.
In words: At least one sample mean is different.
What is the main problem with their hypotheses?
They wrote the null hypothesis as an inequality (the null should include equality). Incorrect They swapped the null and alternative hypotheses. Incorrect Nothing is wrong; the hypotheses are stated correctly. Incorrect They used sample statistics (like x̄ or s2) instead of population parameters. Correct MC4a0c_f8be
Your lab partner is trying again (eye roll).
Scenario: Two-sample mean test (Shannon diversity 2014 vs 2024)
Ecologists compare Shannon Diversity Index measurements taken at the same set of sites in 2014 and 2024.
Research question: Is the 2024 value smaller than the 2014 value?
They wrote the hypotheses below:
H0: μ2014 (mu_2014) = μ2024 (mu_2024)
In words: The mean Shannon Diversity Index values in 2014 and 2024 are equal.
HA: μ2024 (mu_2024) < μ2014 (mu_2014)
In words: The mean Shannon Diversity Index value in 2024 is less than the value in 2014.
What is the main problem with their hypotheses?
Nothing is wrong; the hypotheses are stated correctly. Correct They wrote the null hypothesis as an inequality (the null should include equality). Incorrect They used sample statistics (like x̄ or s2) instead of population parameters. Incorrect They swapped the null and alternative hypotheses. Incorrect MC7342_f8be
Your lab partner is trying again (eye roll).
Scenario: Two-sample mean test (Shannon diversity 2014 vs 2024)
Ecologists compare Shannon Diversity Index measurements taken at the same set of sites in 2014 and 2024.
Research question: Is the 2024 value larger than the 2014 value?
They wrote the hypotheses below:
H0: x̄2014 (xbar_2014) = x̄2024 (xbar_2024)
In words: The mean Shannon Diversity Index values in 2014 and 2024 are equal.
HA: x̄2024 (xbar_2024) > x̄2014 (xbar_2014)
In words: The mean Shannon Diversity Index value in 2024 is greater than the value in 2014.
What is the main problem with their hypotheses?
Nothing is wrong; the hypotheses are stated correctly. Incorrect They wrote the null hypothesis as an inequality (the null should include equality). Incorrect They used sample statistics (like x̄ or s2) instead of population parameters. Correct They swapped the null and alternative hypotheses. Incorrect MCd73c_4cd4
Your lab partner is trying again (eye roll).
Scenario: One-sample mean test (baby weights)
Joe's Hospital of Fried Foods claims their newborns are heavier than the national average.
The national average birth weight is 7.5 lbs.
Research question: Is the mean lower than 7.5 lbs?
They wrote the hypotheses below:
H0: μhospital (mu_hospital) = 7.5
In words: The hospital mean birth weight equals 7.5 lbs.
HA: μhospital (mu_hospital) < 7.5
In words: The hospital mean birth weight is less than 7.5 lbs.
What is the main problem with their hypotheses?
They swapped the null and alternative hypotheses. Incorrect They wrote the null hypothesis as an inequality (the null should include equality). Incorrect They used sample statistics (like x̄ or s2) instead of population parameters. Incorrect Nothing is wrong; the hypotheses are stated correctly. Correct