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)
===============================