You are consulting with the manager of an Accounts Receivable department of a large manufacturing company. The manager is concerned that some of the customer accounts are not being paid promptly under the current payment terms.The current payment terms specify 14 days for receipt of payment of all bills. Since the manager did not have any hard evidence, you suggested that the manager collect some data that could then be analyzed.

Based on your advice, the manager collects a stratified random sample over a typical 2-month period (a random sample of each week's records for each day the company was open for business, including Saturday).

Conduct the appropriate analysis and present your findings and conclusions as well as your recommendations to the Accounts Receivable manager below.

Week 1

14 13 11 14 13 19

Week 2

12 18 13 16 15 17

Week 3

15 16 18 16 13 26

Week 4

27 25 23 26 23

Week 5

21 12 14 15 13 11

Week 6

14 19 19 18 14 19

Week 7

18 22 20 23 24 22

Week 8

28 26 25 27 29