Thats what I was wondering unbiasedness is based on E(Z*) = the
mean,
But we know Z* is not the mean because we are estimating it. I'm sure
it's true, otherwise E(Z*-Z) = 0 would not be published so many books,
however there is not a lot of explanation of this assumption.
pp252
BLUE : Best Linear Unbiased Estimator
Best : Minimium
error variance.
Linear : Linear
combination of sample values.
Unbiased : E(Z*-Z) = 0
Estimator: An estimate
Is unbiasedness a fas? E(Z*-Z) = 0
E(sumwZ(x) Z) = 0
sumwu u =0 says all Z(x) =u this is not true?
No, average of (Z*-Z) is zero average of (sum wZi - Z i)s zero sum wi times average of Z - average if Z =0 if sum w = 1 then this is true, otherwise notSays nothing at all about the average of Z.OK? IsobelDigby Millikan [EMAIL PROTECTED] wrote:BLUE : “Best Linear Unbiased
