Re: Dispersion Test-whether Poisson or NB?

Posted by Ryan on May 02, 2014; 1:31pm
URL: http://spssx-discussion.165.s1.nabble.com/Dispersion-Test-whether-Poisson-or-NB-tp5725769p5725771.html

Assuming you have the same covariates and data in both models, a likelihood ratio test is permitted.

On May 2, 2014 8:58 AM, "Rara" <[hidden email]> wrote:
>
> Hi all,
>
> I'm new to SPSS and I would be very thankful if you please help me with my
> problem.
> I want to check the dispersion of my count variable to see whether I should
> use Poisson regression or the Negative Binomial? I was wondering if it's
> possible to do the statistical test for over-dispersion in SPSS? If yes,
> how?
>
> Thank you,
> Rara
>
>
>
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