Assignment:
Telemarketers for a mail-order firm are assigned to make a total of 200 calls each day, then record the number of potential customers who are interested in receiving a catalog and first-order discount coupon in the mail. For each of the past 50 days, the number of catalog/coupon packages sent is as shown here. Construct one or more appropriate control charts and comment on the state of control of the process.
|
Days
|
|
|
|
Successes
|
|
|
|
|
1-15
|
21
|
16
|
23
|
16
|
22
|
19
|
23
|
25
|
|
|
IS
|
22
|
17
|
21
|
21
|
23
|
15
|
|
|
16-30
|
18
|
20
|
14
|
24
|
18
|
18
|
22
|
27
|
|
|
15
|
13
|
29
|
18
|
21
|
21
|
25
|
|
|
31-45
|
20
|
24
|
15
|
20
|
21
|
11
|
19
|
17
|
|
|
22
|
16
|
17
|
28
|
23
|
22
|
16
|
|
|
46-50
|
22
|
18
|
19
|
15
|
21
|
|
|
|
Provide complete and step by step solution for the question and show calculations and use formulas.