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2009 Sep 08
1
Unexpected behavior in friedman.test and ks.test
...s (patients) for 100 independent variables (different blood analyses). Question was whether the data is normally distributed for each of the analyses and, hence, whether I can apply a parametric test or not. Once I had loaded the data in a dataframe (and it looks as expected), I ran: ks.test(myData$f1_A, pnorm) ks.test(myData$f8_A, pnorm) They give p-values of < 2.2e-16 (with ties) and 8.882e-16. The Excel Add-In gives p-values of? 0.0074491 and, respectively,?0.2730477 Here the difference is serious, like between highly significant non-normal for both f1 and f8 (R), or one non-normal and o...