G*Power is a powere analysis package that is freely available. You can
download it at:
http://www.psychologie.uni-trier.de:8000/projects/gpower.html
You can calculate a sample size for a given effect size, alpha level, and
power value.
-----Original Message-----
From: Scheltema, Karen [mailto:[EMAIL PROTECTED]]
Sent: Friday, February 23, 2001 10:07 AM
To: [EMAIL PROTECTED]
Subject: Sample size question
Can anyone point me to software for estimating ANCOVA or regression sample
sizes based on effect size?
Karen Scheltema
Statistician
HealthEast
Research and Education
1700 University Ave W
St. Paul, MN 55104
(651) 232-5212 fax (651) 641-0683
[EMAIL PROTECTED]
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