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 at 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.mes at cbs.dk Priv: PDalgd at gmail.com