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Re: RE: st: Checking to see if the association between two variables is linear or otherwise


From   "JVerkuilen (Gmail)" <jvverkuilen@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: RE: st: Checking to see if the association between two variables is linear or otherwise
Date   Fri, 12 Oct 2012 23:04:33 -0400

On Fri, Oct 12, 2012 at 10:46 PM, David Kantor <kantor.d@att.net> wrote:

> I agree, noting that highest grade attained is better than years in
> education, but it is still not appropriate, as it is not an interval scale.
> The "same" increments between values do not have the same significance.
> For example, the significance of the increment from grade 11 to 12 is not
> the same as from 10 to 11.

Interesting point. I bet this could probably be ameliorated using
regression splines with knots at key grade milestones.

Jay
-- 
JVVerkuilen, PhD
jvverkuilen@gmail.com

"Out beyond ideas of wrong-doing and right-doing there is a field.
I'll meet you there. When the soul lies down in that grass the world
is too full to talk about." ---Rumi
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