A researcher needs to conduct a suitable nonparametric test to compare two dependent variables. Which of the following should he use?
A) Wilcoxon rank sum test
B) Wilcoxon signed-rank test
C) $t$-test
D) Kruskal-Wallis test

Question

A researcher needs to conduct a suitable nonparametric test to compare two dependent variables. Which of the following should he use? 
A) Wilcoxon rank sum test
B) Wilcoxon signed-rank test
C) $t$-test
D) Kruskal-Wallis test

Quizplus · Accepted Answer

The Wilcoxon signed-rank test is the correct choice for comparing two dependent variables using a nonparametric approach. This test is used when the data does not meet the assumptions necessary for a parametric test like the $t$-test, specifically when the data are paired or matched in some way (e.g., before-and-after measurements on the same subjects).

A Researcher Needs to Conduct a Suitable Nonparametric Test to Compare