Which of the Following Statements About the Two-Sample Wilcoxon Rank

question 1

Multiple Choice

Which of the following statements about the two-sample Wilcoxon rank sum test is/are FALSE?

• A)The samples must each be independent simple random samples.
• B)The observations from the combined samples are placed in rank order.
• C)The Wilcoxon rank sum statistic is the sum,W,of the ranks for the observations in the first sample.
• D)The distribution of W has mean If the populations are Normally distributed.
• E)The hypothesis that the two populations have identical distributions is rejected when the statistic W is far from its mean.

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