Question: Prove that, if X1, ..., X, are i.i.d. random variables with E[X] = and Var[X] = 0, -1 and X = n1X, then E[X]

Prove that, if X1, ..., X, are i.i.d. random variables with E[X] 

Prove that, if X1, ..., X, are i.i.d. random variables with E[X] = and Var[X] = 0, -1 and X = n1X, then E[X] = and Var[X] = 0/n.

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