If all possible samples of size n are drawn from an infinite population with a mean of 15 and a standard deviation of 5, then the standard error of the sample mean equals 1.0 only for samples of size: $\begin{array}{|l|l|}
\hline \text { A. } & 5 . \
\hline \text { B. } & 15 . \
\hline \text { C. } & 25 . \
\hline \text { D. } & 75 . \
\hline
\end{array}$

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The Answer of If all possible samples of size n are drawn from an infinite population with a mean of 15 and a standard deviation of 5, then the standard error of the sample mean equals 1.0 only for samples of size: $\begin{array}{|l|l|}
\hline \text { A. } & 5 . \
\hline \text { B. } & 15 . \
\hline \text { C. } & 25 . \
\hline \text { D. } & 75 . \
\hline
\end{array}$

If All Possible Samples of Size N Are Drawn from an Infinite