In Developing an Interval Estimate for a Population Mean,the Population $\sigma$

question 27

Multiple Choice

In developing an interval estimate for a population mean,the population standard deviation $\sigma$ was assumed to be 10.The interval estimate was 50.92 $\pm$ 2.14.Had $\sigma$ equaled 20,the interval estimate would be

• A) 60.92 \(\pm\) 2.14
• B) 50.92\(\pm\)12.14
• C) 101.84 \(\pm\) 4.28
• D) 50.92 \(\pm\) 4.28

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