Re: ANCOVA vs. sequential regression

[Paul Swank]

It's also called a test of homogeneity of regression slopes, but it is really just a an interaction. There is also a test of parallelism in profile analysis which tends to confuse the issue. I sometimes wonder if it is worth it to try and give all these tests names. An interaction is always a test of parallel lines whether it is factoral anova, ancova, regression, or profile analysis.

At 01:40 AM 4/22/01 GMT, you wrote:
>Paul Swank <[EMAIL PROTECTED]> wrote:
>: I agree. ...
>
>It's usually called a test of parallelism. The Ancova test is a test of
>separation only if the lines are parallel
>
>
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------------------------------------
Paul R. Swank, PhD.
Professor & Advanced Quantitative Methodologist
UT-Houston School of Nursing
Center for Nursing Research
Phone (713)500-2031
Fax (713) 500-2033
soon to be moving to the Department of Pediatrics
UT Houston School of Medicine

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