Homework: HW 14: Confidence Question 3, 6.2.17-T HW Score: 20.83%, 1.25 of 6 points Intervals - Sigma Unknown T (6.2 Part 1 of 3 O Points: 0 of 1 Save ions In a random sample of 18 people, the mean commute time to work was 31.1 minutes and the standard deviation was 7.1 minutes. Assume the population is normally distributed and use a 1-distribution to construct a 90% confidence interval for the population mean u. What is the margin of error of u? Interpret the results. eedback on The confidence interval for the population mean p is (D.. (Round to one decimal place as needed.)