The number of customers who are not satisfied with the service provided in a retail store is

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The number of customers who are not satisfied with the service provided in a retail store is found for 20 samples of size 100 and is shown in Table 8-16. Construct a control chart for the proportion of dissatisfied customers. Revise the control limits, assuming special causes for points outside the control limits.
TABLE 8-16
The number of customers who are not satisfied with the
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