To use the Wilcoxon Rank Sum Test as a test for location, we must assume that:
A) the obtained data are either ordinal or interval where the normality requirement necessary to perform the equal-variances t-test ofis unsatisfied
B) both samples are randomly and independently drawn from their respective populations
C) both underlying populations from which the samples were drawn are equivalent in shape and dispersion
D) all of these
E) none of these

Question

Quizplus · Accepted Answer

The Wilcoxon Rank Sum Test requires all of the mentioned assumptions: the data should be at least ordinal or interval where normality is not assumed (A), the samples must be randomly and independently drawn (B), and the populations should have similar shapes and dispersions (C).

To Use the Wilcoxon Rank Sum Test as a Test