Question: Let X 1 , X 2 , X 3 , . . ., X n be a random sample. Show that the sample mean is

Let X1, X2, X3, . . ., Xn be a random sample. Show that the sample mean=X = X + X+...+Xn n

is an unbiased estimator of θ = EXi.

=X = X + X+...+Xn n

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