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quartz/content/vault/econometrics/Variance.md
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#stats #math

!Pasted image 20210929144959.png

pg 95 of Mathematical statistics with applications by Dennis D. Wackerly, William Mendenhall, Richard L. Scheaffer (z-lib.org).pdf

This is way simplified by V(Y)=E(Y^2)-E(Y)^2 =E(Y^2)-\mu_Y^2