a) Let X₁, X₂, X, denote a random sample from N (0,02) distribution with probability density function: 1 O√2π And let S² = be the estimator of o². i) Show whether or not that S² is an unbiased estimator of o²? ii) Show that S² is a consistent estimator of o². f(x; σ²) = Σ',xp n e 20² -0

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