I need some help

the publisher assumes o is 1.7 minutes and that the population of times is normally distributed. 10 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, 10 11 11 10 6 9 9 7 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. 10 7 6 The 90% confidence interval is ( , ). (Round to one decimal place as needed.) 8 9