Date: Thu, 23 Feb 2006 10:05:36 -0800
Reply-To: STAT_naive <bhawna.goel@GMAIL.COM>
Sender: "SAS(r) Discussion" <SAS-L@LISTSERV.UGA.EDU>
From: STAT_naive <bhawna.goel@GMAIL.COM>
Subject: help on Randomization needed
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need help on randomization by stratification and blocking.
Q 1 What is the minimum block size for a trial of 3 treatment groups,
stratified by 3 clinics and a severity index of mild Vs moderate, and
an allocation ratio of 1:1:2 ? How many different sets of permuted
blocks are needed ?
Q 2. How many distinct permuted blocks are possible given two treatment
groups, 2:1 allocation and a block size of 6? (For example AABAAB and
ABABAA are distinct permuted blocks of size 6). ?
CAN ANYONE PASS ON SOME HINTS??