[R] [OT] factorial design

Edna Bell edna.bell01 at gmail.com
Tue Nov 4 06:29:10 CET 2008

Dear R Gurus:

I vaguely remember reading that if interaction was present in a
factorial design, then the main effect results were suspect.

However, I was reading a text which now uses the tests for main
effects even if interaction is present.

Which is correct, please?

Edna Bell

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