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Re: st: conditional test after logistic regression
From
Maarten buis <[email protected]>
To
[email protected]
Subject
Re: st: conditional test after logistic regression
Date
Wed, 14 Apr 2010 16:03:08 +0000 (GMT)
--- On Wed, 14/4/10, Ricardo Ovaldia wrote:
> The article that I am reading states the null in terms of
> beta - Ho: (Bx|By)=0
>
> Would your answer change if y=x^2?
>
> So that the model would be:
>
> logistic case x x2
>
> where x2=x^2
>
> and the null is now, Ho: (Bx2|Bx)=0 ?
Ok, I think I see what you mean. I would then state the H0 as
(Bx2|Bx=0)=0 or probably more interesting is (Bx|Bx2=0)=0.
The latter hypothesis would mean whether there is an effect,
given that the effect is non-quadratic. You could test that
as follows:
logistic case x
test x
Hope this helps,
Maarten
--------------------------
Maarten L. Buis
Institut fuer Soziologie
Universitaet Tuebingen
Wilhelmstrasse 36
72074 Tuebingen
Germany
http://www.maartenbuis.nl
--------------------------
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