Which of these tests is a nonparametric method to compare two or more populations when the samples are independent and the data are either ordinal or interval but not normal?
A) the Kruskal-Wallis test
B) the Friedman test
C) the Wilcoxon rank sum test
D) the Wilcoxon signed-rank sum test

Question

Quizplus · Accepted Answer

The Kruskal-Wallis test is a nonparametric method used to compare two or more populations when the samples are independent and the data are either ordinal or interval but not normal. The Friedman test is also a nonparametric test for dependent samples, and the Wilcoxon rank sum test and the Wilcoxon signed-rank sum test are used to compare two populations.

Which of These Tests Is a Nonparametric Method to Compare