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Re: st: RE: Poisson regression with score/scale as DV
From
David Hoaglin <[email protected]>
To
[email protected]
Subject
Re: st: RE: Poisson regression with score/scale as DV
Date
Tue, 3 Apr 2012 06:48:36 -0400
It would help to know more about the "pile-up of responses at zero."
Do the frequencies of positive scores tend to decrease, with the
largest frequency at 1? Or do the positive scores have a mode at some
value greater than 1? Those are two kinds of zero-inflated mixtures.
You may need a mixture or two-part model.
David Hoaglin
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