Which nonparametric test would be the most powerful for testing for possible significant differences between two correlated samples?
A) Median test
B) Mann-Whitney U test
C) Sign test
D) Wilcoxon signed rank test

Question

Quizplus · Accepted Answer

The Wilcoxon signed rank test is the most suitable nonparametric test for two correlated samples as it compares the medians of the paired differences. It has more power than the other three options because it takes into account the correlation between the two samples. The median test, Mann-Whitney U test, and sign test are better suited for independent samples testing.

Which Nonparametric Test Would Be the Most Powerful for Testing