The Following MINITAB Output Presents A $95 \%$ Confidence Interval Find the Sample Size Needed So That The

question 91

Multiple Choice

The following MINITAB output presents a $95 \%$ confidence interval.
$\begin{array}{ccccc}\hline{\text { The assumed sigma }=7.9655} & \\\text { Variable } & \mathrm{N} & \text { Mean } & \text { SE Mean } & 95 \% \mathrm{CI} \\\mathrm{x} & 56 & 53.559 & 1.0644 & (51.473,55.645) \\\hline\end{array}$

Find the sample size needed so that the $99 \%$ confidence interval will have a margin of err $1.1$ . rror of

• A) 284
• B) 15
• C) 348
• D) 202

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