10-4. Suppose {X1,X2, . . . ,Xn} is a set of sample random variables taken from a...

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10-4. Suppose {X1,X2, . . . ,Xn} is a set of sample random variables taken from a population that is N(μ, σ). Is T = (X1−X)2 n an unbiased estimator of σ2?

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