The Following MINITAB Output Presents a Confidence Interval for a Population

question 7

Multiple Choice

The following MINITAB output presents a confidence interval for a population mean.
$\begin{array}{crrrcc}\hline \text { Variable } & \mathrm{N} & \text { Mean } & \text { StDev } & \text { SE Mean } & 99 \% \mathrm{CI} \\\mathrm{x} & 23 & 139.9598 & 34.2443 & 7.1404 & (119.824,160.096) \\\hline\end{array}$

Find the critical value $t _ { \alpha / 2 }$ for a $98 \%$ confidence interval.

• A) \(2.820\)
• B) \(2.508\)
• C) \(2.500\)
• D) \(2.807\)

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