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Re: st: Three or four-parameter logistic dose response model


From   Joseph Coveney <jcoveney@bigplanet.com>
To   Statalist <statalist@hsphsun2.harvard.edu>
Subject   Re: st: Three or four-parameter logistic dose response model
Date   Fri, 13 Jul 2007 11:50:06 +0900

I wrote:

There are variations in weighting schemes as well as nomenclature.

--------------------------------------------------------------------------------

Actually, as I recall, what Harvey Motulsky is doing is not weighting so
much as imposing a nonlinear constraint in order to make sure that the
confidence interval lies within the parameter space for a concentration.

Joseph Coveney

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