2 (20 pts) Let ( X 1 , ldots, X n ) be a random sample drawn from a finite population ( left w 1 , ldots, w N ight ) Find an unbiased estimator of the population variance ( sigma 2 answers

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Question: ??????? 2. (20 pts) Let ( X_{1}, ldots, X_{n} ) be a random sample drawn from a finite population ( left{w_{1}, ldots, w_{N} ight} ).

??????? 2. (20 pts) Let $ X_{1}, \ldots, X_{n} $ be a random sample drawn from a finite population $ \left\{w_{1}, \ldots, w_{N}\right\} $. Find an unbiased estimator of the population variance \( \sigma^ 2 answers

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