Hi Iasonas , This is a stat question and not an R question. But the general answer is that it could happen :)
The R question would have been if their is a Tukey HSD for kruskel.test, the answer is yes: http://stats.stackexchange.com/questions/17342/is-there-a-nonparametric-equivalent-of-tukey-hsd But if you didn't get any significant result from the pairwise comparison, I would say that the post hoc correction wouldn't help you (it could be that the reason for this significance is based on some weird contrast...) Best, Tal ----------------Contact Details:------------------------------------------------------- Contact me: tal.gal...@gmail.com | 972-52-7275845 Read me: www.talgalili.com (Hebrew) | www.biostatistics.co.il (Hebrew) | www.r-statistics.com (English) ---------------------------------------------------------------------------------------------- On Thu, Jan 12, 2012 at 8:35 AM, Iasonas Lamprianou <lampria...@yahoo.com>wrote: > Dear all, > > I run a kruskal wallis test and found significant results. Then, I > conducted all pairwise comparisons and found no significant results. Could > anyone please give me a hint as to why this happens or redirect me towards > a specific web page where I can find more info? (I used alpha=5% and made > no bonferroni or other correction for the pairwise comparisons) > Thank you > > > Dr. Iasonas Lamprianou > Department of Social and Political Sciences > University of Cyprus > [[alternative HTML version deleted]] > > > ______________________________________________ > 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. > > [[alternative HTML version deleted]] ______________________________________________ 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.
