The nonparametric test for the correlation between two variables is known as the ________.
A) Wilcoxon signed-rank test
B) Wilcoxon rank-sum test
C) Kruskal-Wallis test
D) Spearman's rank correlation test

Question

Quizplus · Accepted Answer

The Spearman's rank correlation test is the nonparametric test used to determine the correlation between two variables when the data do not meet the assumptions of parametric tests. This test is used when the variables are measured on an ordinal or interval scale, and their relationship is non-linear. The Wilcoxon signed-rank and rank-sum tests are used to compare two groups or two variables, and the Kruskal-Wallis test is used to compare three or more groups or variables. Therefore, the best choice is D, Spearman's rank correlation test.

The Nonparametric Test for the Correlation Between Two Variables Is