A random sample of the closing stock prices in dollars for a company in a recent year is listed below. Assume that o is $2.19. Construct the 90% and 99% confidence intervals for the population mean....

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Extracted text: A random sample of the closing stock prices in dollars for a company in a recent year is listed below. Assume that o is $2.19. Construct the 90% and 99% confidence intervals for the population mean. Interpret the results and compare the widths of the confidence intervals. 21.58 22.05 19.11 18.01 22.53 20.55 19.57 20.21 17.34 19.82 15.68 22.01 18.56 16.07 18.56 15.46 The 90% confidence interval is ($ $ ). (Round to two decimal places as needed.) Enter your answer in the edit fields and then click Check Answer. ? 3 3 parts remaining Clear All Check Answer O 12:18