Question 5 and 6

Question 5 1 pts The time required for an automotive center to complete an oil change service on an automobile approximately follows a normal distribution, with a mean of 15 minutes and a standard deviation of 2 minutes. If the automotive center does not want to give the discount to more than 5% of its customers, how long should it make the guaranteed time limit? Round up your answer. Question 6 1 pts A doctor wants to estimate the mean HDL cholesterol of all 20- to 29-year-old females. How many subjects are needed to estimate the mean HDL cholesterol within 2.5 points with 95% confidence assuming s-11.5 based on earlier studies? Round up your