Missing Data and Repeated Measures ANOVA

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#1031

From: runde.1
Date: Tue, 06 Jul 1993 16:49

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I am deciding on a method for the following experiment:

I am collecting data on 11 sites, with three replicates per site,
by taking samples every 2 weeks for 1 year.  I want to compare
the sites after every sampling period.  I believe a repeated 
measures ANOVA done after each sampling period should fit the
bill. I have two complications having to do with missing data.  I have
missing replicates and I have times where all replicates are missing from
one or more sites.  These are all due to the effects of mother
nature. I know of equations to impute values for missing data that have
been applied to randomized block designs. (Biometry by Sokal and
Rohlf, second
edition, pages 364-367)

My questions are:
1) Can the missing data equations be applied to repeated measures ?
2) If so, can the equation be used for missing 1-2 replicates of 3 ?
3) Can the equation be used for instances where all three reps from 
   a site are missing ?

Thanks

e-mail runde@nd.edu

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From: runde.1@nd.edu
Subject: Missing Data and Repeated Measures ANOVA
Message-ID: <1993Jul6.164922.8832@news.nd.edu>
Keywords: ANOVA, missing data
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Organization: Univ. of Notre Dame
Date: Tue, 6 Jul 1993 16:49:22 GMT
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