8.6 8.3 7.6 6 7.1 5.6 5.1 6 Question 18 options: It is known that the number of hours a student sleeps per night has a normal distribution. The sleeping time in hours of a random sample of 8 students is given below. See Attached Excel for Data. sleep hours data.xlsx Compute a 98% confidence interval for the true mean time a student sleeps per night and fill in the blanks appropriately. We have 98 % confidence that the true mean time a student sleeps per night is between (round to nearest 3 decimal)