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Date:   Tue, 10 Jul 2007 16:58:48 -0400
Reply-To:   Wensui Liu <liuwensui@GMAIL.COM>
Sender:   "SAS(r) Discussion" <SAS-L@LISTSERV.UGA.EDU>
From:   Wensui Liu <liuwensui@GMAIL.COM>
Subject:   Re: Can I do this multiplr regression?
Comments:   To: Xiaobing Fang <xfang@lsu.edu>
In-Reply-To:   <OF4A31475F.0DE90BF1-ON8625730F.006662A6-8625730F.006662B3@lsu.edu>
Content-Type:   text/plain; charset=ISO-8859-1; format=flowed

XB, your colleague regression is as simple as X2 = X0 X1 X3 X4 as long as no assumption is violated here, then you should be ok.

On 7/5/07, Xiaobing Fang <xfang@lsu.edu> wrote: > Hi, > > A colleague asked me if he can do this multiple regression. He first > calculated differences from X1 and X2 and used it as the dependent variable > (Y). Then he wanted to run regression Y = X0 X1 X3 X4 where Y is the > difference between X1 and X2, and he wanted to put X1 as one predictor. X0, > X3, X4 are independent from Y. > > Can this multiple regression be done? Which assumption is violated? > > Thanks, > > Xiaobing >

-- =============================== "I am dying with the help of too many physicians." - Alexander the Great, on his deathbed =============================== WenSui Liu (http://spaces.msn.com/statcompute/blog) ===============================


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