6. Suppose we have i.id. Xi, , Xn ~ N(μ, σ2). In the class, we learned...

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6. Suppose we have i.id. Xi, , Xn ~ N(μ, σ2). In the class, we learned that Σί i m(Xi-X) X2-1. Use this fact and answer the following questions. (a) Consider an estimator σ-c Σηι (Xi-X)2. Find its mean and variance.

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uwe leantned that Z(x-x) 2, Le 스2 2. 2.

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