Re: covariate significance
From: "R. E. Port"
Subject: Re: [NMusers] covariate significance
Date: Fri, 19 Apr 2002 09:30:24 +0200 (CEST)
Dear Jrn:
It seems to me that your original question was about how to choose
between two models which differ in structure but not in the number
of parameters (Lewis, Nick, and E. Olofsen suggest more flexible
alternatives with an additional parameter). In the case of two models
with the same number of parameters there is no statistical criterion
for comparison - as far as I know. Thus, you should not only use
biological knowledge in making your choice but you have to.
With best regards, Ruedi
-------------------------------------------------------------------------------
Dr. R.E. Port, German Cancer Research Center, D-0200
P.O. Box 10 19 49, D-69009 Heidelberg, Germany
phone: +49-6221 42-3381
fax: -3382
e-mail: r.port@dkfz.de