Mathematics, 01.12.2021 22:10 Chartwig4576

HCH's assembly unit has decided to use a p-Chart to monitor the proportion of defective castings produced by their production process. The control limits on these charts will be designed to include 98% of the sample proportions when the process is In Control. The operations manager randomly samples 250 castings at 12 successively selected time periods and counts the number of defective castings in the sample. Sample Defects
17
212
38
414
58
69
78
88
912
107

Required:
a. What is the Lower Control Limit?
b. What is the Upper Control Limit?
c. What is the z score?

Answers: 3

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