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From | Philip Ender <ender97@gmail.com> |
To | statalist@hsphsun2.harvard.edu |
Subject | Re: Re: st: Repeated Measures ANOVA and Missing Values |
Date | Mon, 17 Oct 2011 13:39:10 -0700 |
<john.woodard@wayne.edu> wrote hil, with xtmixed, can I analyze a split-plot type of design that includes a between-groups variable (e.g., group, but unequal sample sizes across groups) and the session repeated measures variable? Would the unbalanced design present problems? I was also wondering what the syntax might look like for that design (one between groups variable, one repeated measures variable)? Many thanks! ------------------- -xtmixed- will handle splitplot type designs that are unbalanced between subjects and have missing observations within subjects. If "a" is the between subjects factor and "b" is the within subject factor, the -xtmixed- code in Stata 12 looks like this: xtmixed dv a##b || id:, var reml See this web page for an example of how to obtain the between and within degrees of freedom: http://www.ats.ucla.edu/stat/stata/faq/denominator_df.htm -- Phil Ender UCLA Statistical Consulting Group * * For searches and help try: * http://www.stata.com/help.cgi?search * http://www.stata.com/support/statalist/faq * http://www.ats.ucla.edu/stat/stata/