question 1b

Question 1. A school is interested in the average number of people on their servers at any particular time. The number of people on the servers during a randomly selected minute of the day is recorded. 20 one minute periods are measured in total during one day. Part A. Build a 95% confidence interval for the average number of people on the server in a day using ratio estimation. Part B. Using ratio estimation, what should the minimum sample size be to be accurate to within 20 units 19 times out of 20? Part C. Suppose you ignored the Minutes built an 95% SRS confidence interval for the mean number of people. Compare your SRS and ratio intervals