Hi Vanessa,
You can use the power tables in Cohen's book: Cohen, J. (1988). Statistical Power Analysis for the Behavioral Sciences. Laurence Erlbaum Associates. pgs 28 - 39. You can calculate power in seconds. Alternatively you could download G Power software
http://www.psycho.uni-duesseldorf.de/aap/projects/gpower/
Kathryn
> Date: Wed, 19 Jul 2006 08:21:34 +0200> From:
[hidden email]> Subject: Power analysis with paired samples> To:
[hidden email]> > Dear List,> I would like to calculate the power of a test of comparison of means with two pairs samples (n=30), but I don't know how to do this.> Could anyone help me?> Thanks,> Vanessa
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