Re: Simple T-test/F-test question.


:> Hello, I am trying to perform a T-test to do a test of the null
:> hypothesis that the means of normally distributed populations are
:> equal. However, as far as I know, the T-test will only test 2
:> different populations. However I need to do the test with four
:> different populations.

:Your problem of comparing 4 means is done via an Analysis of Variance
:(ANOVA) F-test. Your reading was about a different F-test.

That is corrects. The t-test for two independent means is a pecial case
of the one-way analysis of variance when there are only two groups to
compare. With several groups you apply the F-test provided by one-way
ANOVA.

Cheers,
Erkki

040-5024491 <http://www.helsinki.fi/people/Erkki.Komulainen/>
.

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