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“The number of processing errors per 100 purchase orders is monitored by a company with the objective of eliminating such errors totally. Table 8-29 shows samples that were selected randomly from all purchase orders. The company is in the process of testing the effects of a new purchase order form that it has designed. The last five samples were made using the new form. Construct a control chart that the company can use for monitoring the quality characteristic selected. What is the effect of the newly designed purchase order form? Is the company capable of achieving the desired goal of zero errors per 100 purchase orders?”

Table:

Sample Processing Error
1 6
2 4
3 2
4 3
5 4
6 7
7 5
8 7
9 11
10 4
11 2
12 5
13 4
14 3
15 6
16 1
17 5
18 2
19 6
20 4
21 2
22 3
23 2
24 1
25 2
 
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