Re: st: RE: tobit or anything else?

[Berthold Hoppe <berthold.hoppe@charite.de>]

Dear Jay,

you are completely right, it is right skewed. I will try it with - 
intcens-.
As this command needs a description of the distribution:
Do you know a way to choose the correct type of distribution?

Thanks,
Berthold


Am 12 Apr 2008 um 23:59 schrieb Verkuilen, Jay:


> Berthold Hoppe wrote:
>
> > > As -y- in censored (due to lower detection limit of the  
> > > measurements)
> -tobit- instead of -reg- seems to be adequate.<<
>
> Not necessarily. Biological variables subject to lower DLs are
> frequently right skewed, sometimes a lot. I would suggest looking  
> at the
> program -intcens-, which you can download. This fits interval censored
> models, which you can use to handle the DL issue.
>
> Jay
>
>
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