## Question

###### (10) Suppose {X1-Xn}areiid with mean m and variance s2 Let mn be the average of the X;'s. Find the covariance of mn with (Xi-mn) for i=1,n

(10) Suppose {X1-Xn}areiid with mean m and variance s2 Let mn be the average of the X;'s. Find the covariance of mn with (Xi-mn) for i=1,n

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