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 o is 1.9 minutes and that the population of times is normally distributed. 8 7 11 9 12 9 9 10 8 11 11 11 6 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 (.) (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 O The 90% confidence interval Time Remaining: 02 29:26 Next