Suppose E[Y|X]=1. Show Cov(Y,X)=0.?

Please help!!

EDIT: GOT IT, nevermind :)

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- September 17th 2011, 06:14 PMAzaleaSuppose E[Y|X]=1. Show Cov(Y,X)=0.?
Suppose E[Y|X]=1. Show Cov(Y,X)=0.?

Please help!!

EDIT: GOT IT, nevermind :) - September 18th 2011, 03:03 AMSpringFan25Re: Suppose E[Y|X]=1. Show Cov(Y,X)=0.?
just for fun, since the OP has the answer anyway:

first:

and

Then