The sample variance s2 is an unbiased estimator of the population variance $\sigma$2 when the denominator of s2 is: $\begin{array}{|l|l|}
\hline\text { A. } & n \
\hline \text { B. } & n-1 \
\hline \text { C. } & \sqrt{n} \
\hline \text { D. } & n+1 \
\hline
\end{array}$

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The Answer of The sample variance s2 is an unbiased estimator of the population variance $\sigma$2 when the denominator of s2 is: $\begin{array}{|l|l|}
\hline\text { A. } & n \
\hline \text { B. } & n-1 \
\hline \text { C. } & \sqrt{n} \
\hline \text { D. } & n+1 \
\hline
\end{array}$

The Sample Variance S2 Is an Unbiased Estimator of the Population