Tukey, Bartlett
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
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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