In a situation with three groups, you would normally do a one-way analysis of variance. If you were to use a rank-order method, however, you would use the:
A)Wilcoxon signed-rank test
B)Wilcoxon rank-sum test
C)Kendall's tau
D)Kruskal-Wallis H test

Question

Quizplus · Accepted Answer

The Kruskal-Wallis H test is the appropriate rank-order method to use in a situation with three groups. It is a non-parametric test that compares the medians of the groups and is used in place of the one-way analysis of variance when normality assumptions are not met. The Wilcoxon signed-rank test is used for paired samples, the Wilcoxon rank-sum test is used for two independent samples, and Kendall's tau is a measure of correlation.

In a Situation with Three Groups, You Would Normally Do