Help #9

A random sample of the closing stock prices in dollars for a company in a recent year is listed below. Assume that o is $2,49. Construct the 90% and 99% confidence intervals for the population mean, Interpret the results and compare the widths of the confidence intervals. 20.07 20.65 19.15 22.95 22.01 15.15 21.79 16.62 O 18.68 16.31 16.01 21.63 16.89 21.45 18.19 16.33 The 90% confidence interval is ($ ,$ (Round to two decimal places as needed.) The 99% confidence interval is ($ $ ) (Round to two decimal places as needed.) Which statement below interprets the results correctly? O The 90% confidence interval contains the mean closing stock price 90% of the time and the 99% confidence interval contains the mean closing stock price 99% of the time. O 90% of the mean closing stock prices are in the 90% confidence interval and 99% of the mean closing stock prices are in the 99% confidence interval. The probability that the mean closing stock price is in the 90% confidence interval is about 90% and the probability that the mean closing stock price is in the 99% confidence interval is about 99%. O There is 90% confidence that the mean closing stock price is in the 90% confidence interval and 99% confidence that the mean closing stock price is in the 99% confidence interval. Which interval is wider? The 99% confidence interval The 90% confidence interval