Exercise:
The drug A was administered to neurosis patients, and changes in symptoms following drug A treatment were quantified. Evaluate the beneficial effect of drug A.
There is no corresponding program for PSS or EZR.
Calculation with pairWC0 “including difference 0” results in the following:
Comparative Verification Test
Wilcoxon signed-ranks test: StatFinale, 0.0131; SPSS, 0.018; EZR, 0.0198.
Reports of SPSS & EZR
In both SPSS and EZR, the P values for pairWC that does not include a difference of 0 and pairWC0 that does include a difference of 0 were the same. In other words, the data with a difference of 0 was automatically deleted and calculated. Also, there is a slight difference in the P values between SPSS and EZR. This is likely because SPSS did not perform a continuity correction (the “-0.5” in the numerator of the Z-score).
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