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## S3 method for class 'paired': wilcox.test(x, ...)
data(PrisonStress) with(PrisonStress,wilcox.test(PSSbefore,PSSafter)) with(PrisonStress,wilcox.test(PSSbefore,PSSafter,paired=TRUE)) with(PrisonStress,wilcox.test(paired(PSSbefore,PSSafter)))
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