Hi can you help me with this question?

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 2.3 minutes and that the population of times is normally distributed. 10 11 6 10 7 7 8 12 9 11 8 6 12 8 . . . 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.)