In conducting the Wilcoxon Matched-Pairs Signed Rank test, the difference between each pair of values must be found prior to conducting any ranking.

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The Wilcoxon Matched-Pairs Signed Rank test requires calculating the differences between each pair of values as the first step, because the test is based on the ranks of these differences, not the original values themselves.

In Conducting the Wilcoxon Matched-Pairs Signed Rank Test, the Difference