12.7 Wilcoxon Signed Rank Test

The paired sample non-parametric Wilcoxon signed rank test is performed on the two specified samples. The two samples are expected to be paired (two observations for the same entity). The null hypothesis is that the distributions are the same.

This test does not assume that the two samples are are normally distributed.

If the p-value is less than 0.05 then we reject the null hypothesis and accept the alternative hypothesis, that the distributions differ, at the 95% level of confidence.

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