For a sample of size 30 taken from a normally distributed population with standard deviation equal to 5, a 95% confidence interval for the population mean would require the use of: $\begin{array}{|l|l|}
\hline\text { A. } & z=1.96 . \
\hline \text { B. } & z=1.645 . \
\hline \text { C. } & t=2.045 . \
\hline \text { D. } & t=1.699 . \
\hline
\end{array}$

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The Answer of For a sample of size 30 taken from a normally distributed population with standard deviation equal to 5, a 95% confidence interval for the population mean would require the use of: $\begin{array}{|l|l|}
\hline\text { A. } & z=1.96 . \
\hline \text { B. } & z=1.645 . \
\hline \text { C. } & t=2.045 . \
\hline \text { D. } & t=1.699 . \
\hline
\end{array}$

For a Sample of Size 30 Taken from a Normally