Message-ID: <717CFAF4-AD35-4C41-9568-F898EB4DFCBC@u.washington.edu>
Date: 2013-11-27T04:53:47Z
From: Don McKenzie
Subject: Tukey, Bartlett
In-Reply-To: <BLU170-W129E2C0C38C729B8D198ADB8BEF0@phx.gbl>
On Nov 26, 2013, at 5:03 PM, B?atrice Perron <beatrice_perron at hotmail.com> wrote:
> Bonjour, j'ai une s?rie de 18 groupes de donn?es de 20 r?plicats chaque ? comparer (dont plusieurs controles). Est-ce que je peux faire un test de Tukey pour analyser autant de donn?es? si oui, comment? sinon, quel test je peux faire?
>
> J'ai fait un bartlett.test pour v?rifier l'?galit? des variances et la valeurs du test statistique me donne plus que 600, est-ce normal?
>
> Merci!
Here is a URL where you can read an R ?FAQ? (des questiones frequentes) on post-hoc comparisons, but you need to consult a statistician on which test to use for your experiment.
http://www.ats.ucla.edu/stat/r/faq/posthoc.htm
>
>
>
>
>
>
>
>
> [[alternative HTML version deleted]]
>
> ______________________________________________
> 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.
Don McKenzie
Research Ecologist
Pacific Wildland Fire Science Lab
US Forest Service
Affiliate Professor
School of Environmental and Forest Sciences
University of Washington
dmck at uw.edu