The Wilcoxon Rank-Sum Test Is an Appropriate Test When

Multiple Choice

The Wilcoxon rank-sum test is an appropriate test when:

A) comparing two population proportions, assuming the underlying distributions are normal.
B) comparing two population medians, assuming both populations are mound-shaped symmetric.
C) comparing two population medians when the underlying distributions are non-normal or when the data are ranks.
D) testing whether the median value from a single population is different from an assumed value when the distribution is normal.