One sample wilcoxon signed rank test sas

Nov 14, 2015 · Apparently, the author of your book performed a one-sided Wilcoxon signed rank test (hopefully with good reason), whereas the p-value from PROC UNIVARIATE corresponds to a two-sided test. Indeed, you have to divide the resulting p-value by two in order to obtain the appropriate p-value for the one-sided test.

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