The Kruskal-Wallis rank test for differences in more than two medians is a nonparametric alternative to ____
A) Student's t test for independent samples
B) Wilcoxon's rank sum test for differences in two medians
C) ANOVA F test for completely randomised experiments
D) Student's t test for related samples

Question

The Kruskal-Wallis rank test for differences in more than two medians is a nonparametric alternative to  ____
A) Student's t test for independent samples
B) Wilcoxon's rank sum test for differences in two medians
C) ANOVA F test for completely randomised experiments
D) Student's t test for related samples

Quizplus · Accepted Answer

The Kruskal-Wallis rank test is used when comparing the medians of three or more independent groups. It is a nonparametric test that does not assume normality of the data. ANOVA F test is a parametric test used for comparing means of three or more independent groups, but it assumes normality and equal variances. Therefore, the non-parametric Kruskal-Wallis test is an alternative to ANOVA F test.

The Kruskal-Wallis Rank Test for Differences in More Than Two