A Sample of 100 Items Has a Population Standard Deviation $\left[ \begin{array} { l l } 11.60 & 31.60\end{array} \right]$

question 133

Multiple Choice

A sample of 100 items has a population standard deviation of 5.1 and a mean of 21.6.Construct a 95 percent confidence interval for ?.

• A) \(\left[ \begin{array} { l l }
• 11.60 & 31.60
• \end{array} \right]\)
• B) \(\left[ \begin{array} { l l }
• 21.16 & 22.04
• \end{array} \right]\)
• C) \(\left[ \begin{array} { l l }
• 20.60 & 22.60
• \end{array} \right]\)
• D) \(\left[ \begin{array} { l l }
• 20.76 & 22.43
• \end{array} \right]\)

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