A researcher is interested in investigating three independent, non-normally distributed variables. Which of the following should be used for this application?
A) t-test
B) Wilcoxon rank sum test
C) Wilcoxon signed-rank test
D) Kruskal-Wallis test

Question

Quizplus · Accepted Answer

The Kruskal-Wallis test is a non-parametric test used to compare three or more independent non-normally distributed variables, making it the best choice for this application. The t-test is used for independent variables that are normally distributed, while the Wilcoxon rank sum test and Wilcoxon signed-rank test are both used for two independent or dependent non-normally distributed variables.

A Researcher Is Interested in Investigating Three Independent, Non-Normally Distributed