To Apply the Wilcoxon Rank Sum Test to Determine Whether

Multiple Choice

To apply the Wilcoxon rank sum test to determine whether the location of population 1 is different from the location of population 2, what kind of samples must be used?

A) They must be drawn from normal populations.
B) They must be drawn from matched pairs experiment.
C) They must be independent.
D) They must be larger than 30.