Essay
Suppose a process has been monitored daily for the last ten days and the number of machine failures each day was noted. The results follow:
Day Number: 1 2 3 4 5 6 7 8 9 10
Number of Failures: 8 9 6 10 12 4 9 11 9 12
Compute control limits for a c-chart that monitors the average number of machine failures per day. Is the process in a state of control?
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UCL = 18, (Ċ= ∑failures/#obser...View Answer
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