A random sample of size 15 taken from a normally distributed population revealed a sample mean of 75 and a sample variance of 25. The upper limit of a 95% confidence interval for the population mean would equal: $\begin{array}{|l|l|}
\hline\text { A. } & 77.769 \
\hline \text { B. } & 72.231 \
\hline \text { C. } & 72.727 \
\hline \text { D. } & 77.273 \
\hline
\end{array}$

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The Answer of A random sample of size 15 taken from a normally distributed population revealed a sample mean of 75 and a sample variance of 25. The upper limit of a 95% confidence interval for the population mean would equal: $\begin{array}{|l|l|}
\hline\text { A. } & 77.769 \
\hline \text { B. } & 72.231 \
\hline \text { C. } & 72.727 \
\hline \text { D. } & 77.273 \
\hline
\end{array}$

A Random Sample of Size 15 Taken from a Normally