An investigator wanted an estimate of the variance of a population. She drew a sample. Her last step would be to calculate A)$\sigma$ B) $\sigma$² C) $\hat { S }$ D) $\hat{ S }$ ².

Question

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The investigator wants an estimate of the population variance, which is represented by $\sigma^2$. The sample variance, $\hat{S}^2$, is used as an estimate of the population variance.

An Investigator Wanted an Estimate of the Variance of a Population