Q13Section I (Objective (Q1–Q80))13 of 80

Unbiased estimator of $\sigma^2$

Let $x_1,x_2,\dots,x_n$ be a random sample from a distribution $F_\theta$ for which mean and variance exist. Let $\mu$ be the mean and $\sigma^2$ be the variance of the distribution. Then the unbiased estimator of $\sigma^2$ is:

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