The manager of the customer service hotline for an internet service provider has been approached by the President of the company regarding a perceived increase in the number of customer complaints regarding the lack of timely technical assistance being provided by hotline technicians. In order to evaluate the validity of the President's concerns he decided to survey customers regarding their satisfaction with the timeliness of the technical assistance they received. Surveys were conducted during a thirty-day period with one hundred fifty (150) randomly selected customers participating in the survey each day. The number of customers surveyed who expressed dissatisfaction with the timeliness of the technical assistance they received is summarized in the following table.

Using the data contained in the scenario calculates the Upper Control Limit for the number of complaints that reflect a 95.5% confidence level.
Using the data contained in the scenario calculates the Lower Control Limit for the number of complaints that reflect a 95.5%confidence level.
Using the data contained in the scenario and the calculated the Upper and Lower Control Limits for the number of complaints, which samples are out of control?
Using the data contained in the scenario calculates the Upper Control Limit for the proportion of
Using the data contained in the scenario calculates the Lower Control Limit for the proportion of complaints that reflect 95.5% level of confidence.
Using the data contained in the scenario and the calculated the Upper and Lower Control Limits for the proportion of complaints, which samples are out of control?

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No. Complaints No. Complaints 15 17 17 19 av 29 2.3 17 20 16 34 16 17 18 19 20 21 2 2.3 27 29 23 24 2.3 26 27 28 29 30 31 29 15 10 10 21 24 12 13 14 15 24 27 31