Question: A random sample of the closing stock prices for a company in a recent year is listed. Assume that is $2.62. Use the information

A random sample of the closing stock prices for a company in a recent year is listed. Assume that σ is $2.62.

18.41 16.91 16.83 17.72 15.54 15.56 18.01 19.11 19.79 18.32 18.65 20.71

Use the information to construct the 90% and 99% confidence intervals for the population mean. Interpret the results and compare the widths of the confidence intervals. If convenient, use technology to construct the confidence intervals.

18.41 16.91 16.83 17.72 15.54 15.56 18.01 19.11 19.79 18.32 18.65 20.71 20.66 21.04 21.74 22.13 21.96 22.16 22.86 20.86 20.74 22.05 21.42 22.34 22.83 24.34 17.97 14.47 19.06 18.42 20.85 21.43 21.97 21.81

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