Wilcoxon Sign Test Sas. 005 d 146. Exact Wilcoxon Two-Sample Test The NPAR1WAY Procedure.
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. It is in fact a non-paracontinuous level alternative to the dependent samples t-test. The Wilcoxon Sign test is a statistical comparison of the average of two dependent samples.
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.
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. A sign test and the Wilcoxon signed rank test. The Wilcoxon signed rank test is provided by PROC UNIVARIATE not PROC NPAR1WAY see documentation. All three tests produce a test statistic for the null hypothesis that the mean or median is equal to a given value against the two-sided alternative that the mean or median is not equal to.
