answer please

Kumar Pharmacy in Duncan has begun to use drones to deliver prescription medications to Saltspring Island. They would like to determine their cost per delivery. They take a sample of 21 deliveries and find that the average cost per delivery is $17.00 with a standard deviaiton of $6. Give the 95% interval estimate for the true average cost of delivering prescriptions. Answer this question on the work you will submit. Just enter 0 for the answer on the quiz. Your Answer: Answer Question 7 (1 point) Kumar pharmacy would like to reduce the margin of error to $0.50 using the same confidence level and standard deviation as the previous question. How large a sample should they choose? Your