The Unit-Weighted Mean - Because Size Matters

The unit-weighted mean and the unweighted mean measure different pop-ulation parameters with the difference between the two parameters given by covariancebetweenu i andr i dividedbytheexpectationofu i asshowninthe followingderivation: er r= y u r u = E(ur) u r u = E((u u)(r r)) u = ˙ ur u (2.1) Thus the unit-weighted and the unweighted mean ... ................
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