Re: [R] how to run ANCOVA?

From: Richard M. Heiberger <rmh_at_temple.edu>
Date: Thu 24 Aug 2006 - 16:16:00 EST


> But how is that different from just a 3-way ANOVA with age, diagnosis,
> and gender as the the three effects? Isn't ANCOVA a fundamentally
> different model?

> Thanks,
> Sasha

ANCOVA is a linear model with both factors and continuous variables on the right-hand side of the model formula. In pre-computer texts, the commonly used algorithm hid that fact.

Rich



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