Date: Sat, 12 Apr 2008 08:14:57 +0530
Reply-To: ajay ohri <ohri2007@GMAIL.COM>
Sender: "SAS(r) Discussion" <SAS-L@LISTSERV.UGA.EDU>
From: ajay ohri <ohri2007@GMAIL.COM>
Subject: Re: regression: one regressor value changes
Content-Type: text/plain; charset=ISO-8859-1
you can try regress the new variable on the old variable . or at least find
the correlation between the two.
On Sat, Apr 12, 2008 at 6:01 AM, Peter Flom <
> sasworks <xuzengpj@GMAIL.COM> wrote
> >I have a simple linear regression with a few variables. One variable
> >has a value mostly between 1 and 200. The variable value will change
> >to be mostly between 300 and 700. Old value and new value are
> >positively correlated. The higher the old value, the higher the new
> >value. I do NOT have a sample with both old and new values. I only
> >have 2 independent samples, one has the old value and the other has
> >the new value.
> >How can I "transform" the new value into the old value so that I can
> >keep the regression equation the same?
> Why will the variable change? Is it the same variable on some new scale?
> Without knowing more, it's hard to say for sure, but it looks like the NEW
> variable could be the OLD one doubled and adding 300. 1x2 + 300 = 302,
> 200x2 + 300 = 700. Of course, it could be something else entirely.
> Statistical Consultant
> www DOT peterflom DOT com