On Apr 13, 2011, at 17:07 , netrunner wrote: > Hi everyone! > I need to perform a Wilcoxon rank sum test, but I have some ties and the > groups have different size also. When I deal with ties I use the > wilcox.exact function, how can I solve the different size problem using this > function?
What problem? Wilcoxon tests work quite happily with unequal group sizes. There's some loss of power due to imbalance, but the only way around _that_ is to move observations from one group to the other... (And exact testing actually solves a slightly different problem than the tie issue, but never mind.) > > thanks > > net > > -- > View this message in context: > http://r.789695.n4.nabble.com/Wilcoxon-rank-sum-in-unbalanced-design-tp3447400p3447400.html > Sent from the R help mailing list archive at Nabble.com. > > ______________________________________________ > R-help@r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code. -- Peter Dalgaard Center for Statistics, Copenhagen Business School Solbjerg Plads 3, 2000 Frederiksberg, Denmark Phone: (+45)38153501 Email: pd....@cbs.dk Priv: pda...@gmail.com ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.