Wilcoxon Test Sas. The SAS System The NPAR1WAY Procedure Wilcoxon Scores Rank Sums for Variable CONT Classified by Variable LOCATION Sum of Expected Std Dev Mean LOCATION N Scores Under H0 Under H0 Score-----A 7 610 4550 6157651 8714286 B 5 170 3250 6157651 3400000 Wilcoxon Two-Sample Test Statistic S 170000 Normal Approximation Z -24360. First you compute the difference between the two values for each pair then you use this difference as the analysis variable in a PROC UNIVARIATE step.
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The normal approximation for the Wilcoxon two-sample test yields a one-sided p -value of 00382 and a two-sided p -value of 00764. You use the Wilcoxon signed rank sum test when you do not wish to assume that the difference between the two variables is interval and normally distributed but you do assume the difference is ordinal. The wilcoxon option will enable the Mann-Whitney U test.
The wilcoxon option will enable the Mann-Whitney U test.
In addition PROC NPAR1WAY provides tests that use the raw input data as scores. It tests the null hypothesis of no treatment effect in the strata. Wilcoxon Signed-Rank Test SAS Code In SAS PROC MEANS can be used to produce basic descriptive statistics. Mann-Whitney U Test SAS Code PROC UNIVARIATE provides the ability to test for normality while PROC NPAR1WAY provides the ability to perform classic nonparametric tests.
