A publisher wants to estimate the mean length of time (in minutes) all adults spend reading newspapers. To determine this estimate, the publisher takes a random sample of 15 people and obtains the results below. From past studies, the publisher assumes a is 1.8 minutes and that the population of times is normally distributed. 7 11 7 8 11 12 10 9 9. 11 10 12 Construct the 90% and 99% confidence intervals for the population mean. Which interval is wider? If convenient, use technology to construct the confidence intervals. The 90% confidence interval is (D (Round to one decimal place as needed.) The 99% confidence interval is ( ). (Round to one decimal place as needed.) Which interval is wider? O The 99% confidence interval The 90% confidence interval O Time Remaining: 01:27:12 Next Statcrunch MacBook Air FA esc & %24 %23 2 3 4 P Y E R Q W F G

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