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Re: st: right-skewed proportion data


From   David Hoaglin <dchoaglin@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: right-skewed proportion data
Date   Sat, 7 Jul 2012 08:57:05 -0400

Joerg,

If you are modeling the dependent variable, why does its
right-skewness matter?  Much of the apparent right-skewness may be due
to effects of predictors in your model.

The distribution that your model uses for the individual proportions
does matter.  Nick makes a good point about continuous proportions,
but your proportions are likely to be binomial, with variation in both
p and n.

David Hoaglin

On Sat, Jul 7, 2012 at 6:02 AM, Jörg Eulenberger <j.eulenberger@web.de> wrote:
>
> Dear Francisco,
> Yes i want to model it. I want to do a missing-analysis. Dependvar is
> the right-skewed and the undependvars are differed survey methods
> (online vs paper and pencil) under control of gender,  etc.
>
> Dear Maarten,
> thanks a lot.  So, ifI understand youproperly the correct family is
> gaussian?
>
> glm av uv uv, link(logit) vce(robust)
>
> LG,
> Jörg

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