Date:         Thu, 27 Apr 2000 11:32:45 -0500
Reply-To:     Warren Schlechte <wschlech@KTC.COM>
Sender:       "SAS(r) Discussion" <SAS-L@LISTSERV.UGA.EDU>
From:         Warren Schlechte <wschlech@KTC.COM>
Subject:      Does SAS Help Select Necessary Sample Size
Content-Type: text/plain; charset="iso-8859-1"

I have a repeated measures problem, with multiple control and treatment
sites.  I wish to measure the rate of occurrence of a specific genotype
before and after treatment at both control and treatment sites.  Is there a
procedure in SAS that would allow me to specify rates and variances for the
different sites pre and post and the power of detection desired and would
output a sample size necessary to satisfy those constraints?

Thanks for any help.

Sincerely,


Warren Schlechte
Heart of the Hills Research Station
HC7 Box 62
Ingram, Texas 78025
Phone:   830.866.3356
Fax:       830.866.3549