The proper use of the Wilcoxin signed ranks test requires that both the raw scores and the difference between the raw scores be of at least ordinal scaling.

Question

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The Wilcoxin signed ranks test is a non-parametric test that requires the data to be at least of an ordinal scale. This includes both the raw scores and the differences between them. Therefore, the statement is true.

The Proper Use of the Wilcoxin Signed Ranks Test Requires