Date:         Thu, 24 Apr 1997 20:28:20 -0700
Reply-To:     Hiroyuki Yamada <hryamada@socrates.berkeley.edu>
Sender:       "SAS(r) Discussion" <SAS-L@UGA.CC.UGA.EDU>
From:         Hiroyuki Yamada <hryamada@SOCRATES.BERKELEY.EDU>
Subject:      A common slope in two or more covariates
Content-Type: TEXT/PLAIN; charset=US-ASCII

Hi, All:
 
        I am doing an ANCOVA with two or more covariates and would like to
know how to write a command using SAS to check the assumption of a common
slop in this context. Suppose that I have the following variables: DV
(dependent variable), IV (independent var), COV1, COV2, and COV3 (COV =
covariate). Then, I think that the model statement will be:
 
MODEL DV= IV COV1 COV2 COV3 IV*COV1 IV*COV2 IV*COV3/SOLUTION;
 
Is this correct? I would appreciate your help.
 
Hiro