Question 15, 6.2.21-T HW Score: 26.67%, 4 of 15 points = Homewo Save Part 2 of 3 O Points: 0 of 1 In a random sample of 8 people, the mean commute time to work was 33.5 minutes and the standard deviation was 7.4 minutes. A 90% confidence interval using the t-distribution was calculated to be (28.5,38.5). After researching commute times to work, it was found that the population standard deviation is 9.6 minutes. Find the margin of error and construct a 90% confidence interval using the standard normal distribution with the appropriate calculations for a standard deviation that is known. Compare the results. The margin of error of u is 5.58. (Round to two decimal places as needed.) A 90% confidence interval using the standard normal distribution is (Round to one decimal place as needed.) Help me solve this View an example Get more help - Clear all Check answer Nex