The Wilcoxon signed-ranks test is a particularly dubious choice if
A) population variances are unknown
B) n's are small
C) a difference of k score points means something different at various points in the scale
D) normality of distribution cannot be assumed

Question

Quizplus · Accepted Answer

The Wilcoxon signed-ranks test assumes that the differences between paired observations are symmetrically distributed around a median. If a difference of k score points means something different at various points in the scale, this assumption is violated, making the test inappropriate.

The Wilcoxon Signed-Ranks Test Is a Particularly Dubious Choice If