Statistical Tests: Kruskal-Wallis, Mann-Whitney U, and T-tests

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Questions and Answers

What is the Kruskal-Wallis Test used for?

Comparing the means of two independent non-parametric populations

Comparing the performance of two groups

Comparing the number of samples in two groups (correct)

Comparing the normal distribution and/or equal variance

What is the Mann-Whitney U Test used for?

Comparing the means of two independent non-parametric populations

Comparing the performance of two groups (correct)

Comparing the number of samples in two groups

Comparing the normal distribution and/or equal variance

What is the difference between a T-test and a Mann-Whitney U Test?

The T-test is used to compare the means of two independent non-parametric populations, while the Mann-Whitney U Test is used to compare the performance of two groups

The T-test is used to compare the performance of two groups, while the Mann-Whitney U Test is used to compare the means of two independent non-parametric populations (correct)

The T-test is used to compare the number of samples in two groups, while the Mann-Whitney U Test is used to compare the performance of two groups

The T-test is used to compare the normal distribution and/or equal variance, while the Mann-Whitney U Test is used to compare the performance of two groups