What is the appropriate nonparametric method to compare two populations when the samples are independent and where the normality requirement necessary to perform the parametric test is NOT satisfied?
A) Wilcoxon rank sum test
B) sign test
C) Wilcoxon signed-rank sum test
D) equal-variance t test of

Question

Quizplus · Accepted Answer

The Wilcoxon rank sum test is the appropriate nonparametric method to compare two independent populations when the normality requirement necessary for a parametric test is not satisfied. It is also known as the Mann-Whitney U test.

What Is the Appropriate Nonparametric Method to Compare Two Populations