(i) Consider a random sample {X₁: i = 1,...,n} of size n > 1 from N(u, o²) with E(X4) <∞o. Now we have two estimators S and S2-₁ of o². Given that 1 Var (S-1)=(14-04), n where μ4 = E(X -μ)4 and 4 = (02)². Which one of S and S-1 has a smaller mean squared error? Please find their mean squared errors to answer this question. n-3

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