Hello, given situation: - pre / post test comparison of discrete, paired data [values can be 1,2,3,4]. - the data are neither normal distributed nor symetric Which test should I use to calculate the p-value? Is the wilcoxon rank sum test ok ? Alex
The Wilcoxon paired rank sign test assumes symmetry. (cf. basic.northwestern.edu/statguidefiles/srank_paired_alts.html ) Christophe Pallier On 5/10/07, Alexander Kollmann <kollmann@telbiomed.at> wrote:> > Hello, > > given situation: > > - pre / post test comparison of discrete, paired data [values can be > 1,2,3,4]. > - the data are neither normal distributed nor symetric > > Which test should I use to calculate the p-value? Is the wilcoxon rank sum > test ok ? > > > Alex > > ______________________________________________ > R-help@stat.math.ethz.ch mailing list > stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide > R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code. >[[alternative HTML version deleted]]