At 11:26 AM 7/13/01 -0700, Alfred Barron wrote:
>I have to compare treatment dose-response assay
>data. This can be done using regression as in
>Finney's book (among other references). However,
>I understand that non-parametric tests for the
>parallelism of 2 regression lines was coded in SAS
>in the late 70s. While I have some old proc matrix
>code described in SAS SUGI 4 (1979) to do it, does
>anyone have something more current that is online
>somewhere or that they could share ?
>
>My study involves bacterial strains measured under
>different treatment conditions.
would not looking at some interaction plots ... with the associated ANOVA
breakdowns ... be sufficient? is your design ... several strains ... and
several (treatments) doses? ... like a 3 by 3 randomized design or such?
>thanks,
>Al Barron
>Metuchen, NJ
>
>
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_________________________________________________________
dennis roberts, educational psychology, penn state university
208 cedar, AC 8148632401, mailto:[EMAIL PROTECTED]
http://roberts.ed.psu.edu/users/droberts/drober~1.htm
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