In testing for the difference between two populations, it is possible to use____________?
Correct answer: D. Either of the above
- A. The Wilcoxon Rank-Sum test
- B. The Sign test
- C. None of the above
- D. Either of the above
Explanation
For two populations, the Wilcoxon rank-sum test can compare their locations using ranks, while the sign test can compare paired differences or a hypothesized median. Hence either test may be used, depending on the data structure and assumptions.
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