Standard one-way analysis of covariance (with three groups) will do this
for you.
-- DFB.
On 8 Oct 2000, Stanley110 wrote:
> Assume I have three sets of x,y data. I fit each by least-squares to a
> straight line. I determine that the three fitted lines are homogeneous
> and indistinguishable at a certain significance level. I want to express
> the slope (of the three) as a single point estimate and as a confidence
> interval. What is the formula for doing this?
>
> Please reply to this newsgroup and to the writer at <[EMAIL PROTECTED]>.
>
> Thank you for your help.
>
> stan alekman
----------------------------------------------------------------------
Donald F. Burrill [EMAIL PROTECTED]
348 Hyde Hall, Plymouth State College, [EMAIL PROTECTED]
MSC #29, Plymouth, NH 03264 (603) 535-2597
Department of Mathematics, Boston University [EMAIL PROTECTED]
111 Cummington Street, room 261, Boston, MA 02215 (617) 353-5288
184 Nashua Road, Bedford, NH 03110 (603) 471-7128
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