marketing company database
SuperClassThe data in Table 7E.19 are the number of information errors found in customer records in a marketing company database. Five records were sampled each day.
(a) Set up a c chart for the total number of errors. Is the process in control?
(b) Set up a t chart for the total number of errors, assuming a geometric distribution with a = 1. Is the process in control?
(c) Discuss the findings from parts (a) and (b). Is the Poisson distribution a good model for the customer error data? Is there evidence of this in the data?
TABLE 7 E .19 | |||||
Customer Error Data for Exercise 7.67 | |||||
Day | Record 1 | Record 2 | Record 3 | Record 4 | Record 5 |
1 | 8 | 7 | 1 | 11 | 17 |
2 | 11 | 1 | 11 | 2 | 9 |
3 | 1 | 1 | 8 | 2 | 5 |
4 | 3 | 2 | 5 | 1 | 4 |
5 | 3 | 2 | 13 | 6 | 5 |
6 | 6 | 3 | 3 | 3 | 1 |
7 | 8 | 8 | 2 | 1 | 5 |
8 | 4 | 10 | 2 | 6 | 4 |
9 | 1 | 6 | 1 | 3 | 2 |
10 | 15 | 1 | 3 | 2 | 8 |
11 | 1 | 7 | 13 | 5 | 1 |
12 | 6 | 7 | 9 | 3 | 1 |
13 | 7 | 6 | 3 | 3 | 1 |
14 | 2 | 9 | 3 | 8 | 7 |
15 | 6 | 14 | 7 | 1 | 8 |
16 | 2 | 9 | 4 | 2 | 1 |
17 | 11 | 1 | 1 | 3 | 2 |
18 | 5 | 5 | 19 | 1 | 3 |
19 | 6 | 15 | 5 | 6 | 6 |
20 | 2 | 7 | 9 | 2 | 8 |
21 | 7 | 5 | 6 | 14 | 10 |
22 | 4 | 3 | 8 | 1 | 2 |
23 | 4 | 1 | 4 | 20 | 5 |
24 | 15 | 2 | 7 | 10 | 17 |
25 | 2 | 15 | 3 | 11 | 2
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10 years ago
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marketing_company_database.txt
