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View Full Version : C4 - Variance of a-hat in 3-variable regression

Scrubby
10-31-2001, 01:20 PM
I just noticed that my study guide includes the variance of B2-hat and B3-hat but not the variance of a-hat. Could it be:

[(Sum of Xi^2)*(Sigma^2)]/[(N * (1-r^2)*(Sum of (xi-xbar)^2)]



<font size=-1>[ This Message was edited by: Scrubby on 2001-10-31 13:26 ]</font>
Scrubby
10-31-2001, 05:46 PM
Hoooo-kay. I guess no one else knows either.
C8 Guy
10-31-2001, 08:44 PM
The text book doesn't cover the variance of alpha hat so it shouldn't be tested. You must be pretty ready for this exam if your looking for extra stuff to learn!