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Re: st: Sample size question


From   SR Millis <[email protected]>
To   [email protected]
Subject   Re: st: Sample size question
Date   Thu, 9 Dec 2004 06:43:18 -0800 (PST)

> Jeannette Wicks-Lim wrote:
> I'm used to working with very large data sets in my
> regression analyses, but 
> I've encountered a situation where my N is 24, and
> my k (number of 
> independent vars) is 9. I may be able to expand the
> sample to N=36, but in 
> any case, how do you decide when a sample is "too"
> small to be useful? Does 
> it just depend on your results (e.g., standard
> errors are really large)?


In his book (Regresssion Modeling Strategies), Frank
Harrell provides some guidelines. 

Scott Millis


=====
Scott R Millis, PhD, MEd, ABPP (CN & RP)
Director, Office of Clinical Trials
Kessler Medical Rehabilitation Research & Education Corp
1199 Pleasant Valley Way
West Orange, NJ  07052

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