Notice: On April 23, 2014, Statalist moved from an email list to a forum, based at statalist.org.
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: st: RE: Poisson regression with score/scale as DV
From
Clinton Thompson <[email protected]>
To
[email protected]
Subject
Re: st: RE: Poisson regression with score/scale as DV
Date
Tue, 3 Apr 2012 13:30:21 +0200
Approximately a quarter of the values are zero with no other score
emerging as a clear runner-up in terms of frequency of values. In
fact, the remaining values, [1,27], range from <1% up to >6% of the
frequency distribution w/ the responses exhibiting no discernible
monotonicity.
Thanks,
Clint
On Tue, Apr 3, 2012 at 12:48 PM, David Hoaglin <[email protected]> wrote:
> 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
> *
> * For searches and help try:
> * http://www.stata.com/help.cgi?search
> * http://www.stata.com/support/statalist/faq
> * http://www.ats.ucla.edu/stat/stata/
*
* For searches and help try:
* http://www.stata.com/help.cgi?search
* http://www.stata.com/support/statalist/faq
* http://www.ats.ucla.edu/stat/stata/