Which of the following distribution-free tests has the lowest efficiency rating compared to its parametric counterpart?
A) Kruskal-Wallis test
B) Wilcoxon signed-ranks test
C) Rank correlation test
D) Wilcoxon rank-sum test

Question

Quizplus · Accepted Answer

The Rank correlation test, specifically Spearman's rank correlation, generally has lower efficiency compared to its parametric counterpart, Pearson's correlation, especially when the data is normally distributed.

Which of the Following Distribution-Free Tests Has the Lowest Efficiency