| Date: | Thu, 10 Jul 1997 23:00:32 -0500 |
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| Reply-To: | heft@swbell.net |
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| Sender: | "SPSSX(r) Discussion" <SPSSX-L@UGA.CC.UGA.EDU> |
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| From: | Laura and Bill Heft <heft@SWBELL.NET> |
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| Organization: | Southwestern Bell Internet Services |
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| Subject: | Help: What does SPSS do for an ANOVA with unequal sample sizes |
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| Content-Type: | text/plain; charset=us-ascii |
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I am trying to test for difference between 2 independent groups on
several dependent variables. The groups have substantial differences in
sample size. I know that I could use t-tests, ANOVA, or GLM to look for
mean differences, but I don't know what SPSS does to adjust for unequal
n. I think I need to use a weighted or pooled average variance estimate.
My question is, does SPSS provide this automatically with unequal n, or
is there a way to indicate that I want a weighted variance estimate? My
variances appear to be homogeneous (non-significant results from
Levene's test for equality of variance). Any ideas??? Thanks, Laura
Heft
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