On 25 Jul 2000 05:24:23 -0700, [EMAIL PROTECTED] (Dr. N.S. Gandhi
Prasad) wrote:
> Hello
>
> I have fitted a power function
>
> Y = a (X1^b1)*(x2^b2)*(X3^b3)
>
> by transfroming Y as well as Xs in to LOGs and followed least Squares procedure.
>However, the estimate of 'a' is found to be negative. Can we accept the results? What
>meaning can be attached to 'a'. Here Y is output and Xs are input variables
Maybe you have function that is linear in the log of Y and the log of
some Xs. At least, that is the way you solved it; that is what you
describe. That is conceivable.
If the log of something is negative, it means it is a small number
(fraction).
--
Rich Ulrich, [EMAIL PROTECTED]
http://www.pitt.edu/~wpilib/index.html
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