The Wilcoxon signed-ranks procedure is a nonparametric test for the significance of the difference between the distributions of two non-independent samples involving repeated measures or matched pairs. Beginning with a set of n paired values of Xa and Xb, this page will perform the necessary rank-ordering along with all other steps appropriate to the Wilcoxon test. As the page opens, you will be prompted to enter the number of paired values of Xa and Xb.
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