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?(a) The 99% confidence interval(b) The 90% confidence interval

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. 6 12 7 8 11 6 12 8 11 9 9 7 10 7 6 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.)