Suppose there is interest in comparing the median response time for three independent groups learning a specific task.The appropriate nonparametric procedure is ____.
A) Wilcoxon signed rank test
B) Kruskal-Wallis rank test for differences in medians
C) Wilcoxon rank sum test
D) Friedman rank test

Question

Suppose there is interest in comparing the median response time for three independent groups learning a specific task.The appropriate nonparametric procedure is  ____.
A) Wilcoxon signed rank test
B) Kruskal-Wallis rank test for differences in medians
C) Wilcoxon rank sum test
D) Friedman rank test

Quizplus · Accepted Answer

The Kruskal-Wallis rank test is appropriate for comparing the median response time among three independent groups. The Wilcoxon signed rank test is used when comparing two related samples, the Wilcoxon rank sum test is used when comparing two independent samples, and the Friedman rank test is used when comparing three or more related samples.

Suppose There Is Interest in Comparing the Median Response Time