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Re: st: MANOVA to verify difference


From   Ronan Conroy <rconroy@rcsi.ie>
To   "statalist@hsphsun2.harvard.edu" <statalist@hsphsun2.harvard.edu>
Subject   Re: st: MANOVA to verify difference
Date   Wed, 21 Sep 2011 16:43:22 +0100

On 2011 MFómh 21, at 14:36, Damiano Bordogna wrote:

> Is it possible, with MANOVA, to verify if there's some kind of
> difference between different goups of observation?

That is the kind of question that doesn't get you very far. Can you explain what you are trying to do? 

Many statistical procedures examine difference of some kind between groups of observations. And no statistical procedure can verify that there is a difference. All you can do is see how well the observed differences are explained by chance, and, more important, see if the observed effect sizes are of any real life importance. 

Tell us a little more about your problem, then!


Ronán Conroy
rconroy@rcsi.ie
Associate Professor
Division of Population Health Sciences
Royal College of Surgeons in Ireland
Beaux Lane House
Dublin 2


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