A management professor was teaching a course in business leadership as part of an executive MBA program. She divided her class of 10 executives into two equal sized groups and used a different approach (case study and online interactive) to teach about various leadership styles. To compare the effectiveness of the two approaches, the appropriate nonparametric procedure is the
A) Kruskal-Wallis test.
B) Spearman's rho test.
C) Wilcoxon signed-rank test.
D) Wilcoxon rank-sum test.
E) Friedman test.

Question

Quizplus · Accepted Answer

The Wilcoxon rank-sum test is the appropriate nonparametric procedure for comparing the effectiveness of two approaches (case study and online interactive) on two independent samples (the two groups of executives). This test is used when the data does not meet the assumptions necessary for a parametric test (like a t-test) and is suitable for comparing median differences between groups.

A Management Professor Was Teaching a Course in Business Leadership