For a Sample of Size 30 Taken from a Normally

Short Answer

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: $\begin{array}{|l|l|}\hline\text { A. } & z=1.96 . \\\hline \text { B. } & z=1.645 . \\\hline \text { C. } & t=2.045 . \\\hline \text { D. } & t=1.699 . \\\hline\end{array}$