Trouble about the interpretation of intercept in lm models
David Winsemius wrote:
On Jan 13, 2009, at 5:54 PM, Stefano Leonardi wrote:
David Winsemius wrote:
It would be so *if* you had estimated a saturated model, but you did not. Your fit of Y|A values is adjusted for the B values.
Thank you. What do you exactly mean by "Y|A values is adjusted for the B values"?
Another way of expressing it ... the fit of Y|A in the A levels is a weighted average of Y|A,B=0, Y|A,B=1, and Y|A,B=2.
Thanks again. Do you have suggestion for a book (or something else) where I can study these things? Cheers Stefano
====================================================================== Stefano Leonardi Dipartimento di Scienze Ambientali Universita` di Parma E-mail: stefano.leonardi at unipr.it Viale Usberti 11/A Phone : +39-0521-905659 43100 PARMA (Italy) Fax : +39-0521-905402