Q1. The sales manager of a hot meal delivery company is studying the delivery time of their orders. The delivery times of a random sample of orders are listed below: Delivery time (minutes) Number of orders 0 - less than 15 15 – less than 20 10 21 20 – less than 25 25 – less than 30 30 – less than 40 31 19 11 40 – less than 50 50 – less than 60 3 Construct a 95% confidence interval for the population proportion of orders with delivery time between 22 minutes and 38 minutes. (d)