The waiting time to place an order in a fast-food restaurant is normally distributed with a population standard deviation of 1.2 minutes. The sample mean is 5.1 minutes from a sample of 25 orders. The following table can be used: a 96 Confidence Interval 2.12 0.1 90: 1.64 0.05 95' 1.96 (101 99? 253 a. What is the 95% condence interval estimate of the population mean waiting time to place an order? (4 Marks) b. Give a practical interpretation of the condence interval constructed in part (a). (2 Marks) What is the width of the condence interval in part (a)? (2 Marks) What is the margin of error from part (a)? (2 Marks) 9.0