Suppose You Want to Estimate a Population Mean $\mu$ And That $\bar { x } = 145 , \mathrm {~s} = 21 , \mathrm { n } = 750$

question 45

Multiple Choice

Suppose you want to estimate a population mean $\mu$ and that $\bar { x } = 145 , \mathrm {~s} = 21 , \mathrm { n } = 750$ , and $\mathrm { N } = 4000$ . Find an approximate $95 \%$ confidence interval for $\mu$ .

• A) \(145 \pm 0.30\)
• B) \(145 \pm 0.66\)
• C) \(145 \pm 1.38\)
• D) \(145 \pm 2.71\)

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