Question: The manager of a shipping department of a mail-order operation located in New York has been receiving complaints about the length of time it takes for customers in California to receive their orders. To learn more about this potential problem, the manager chose a random sample of 12 orders and then checked to see how many days it took to receive each of these orders. The resulting data were

15, 20, 10, 11, 7,12, 9, 14, 12,8, 13, 16

1. Find a 90 percent confidence interval estimate for the mean time it takes for California customers to receive their orders.
2. Find a 95 percent confidence interval estimate. ’

Price: $2.99

Solution: The downloadable solution consists of 2 pages
Deliverable: Word Document