1. You’ve collected the following data over the past 30 days sampling 100 bottles each day. You remember something about defect charts from your OM 370 class and want to determine if your process is in control.
a. using the data provided, calculate p bar and your upper and lower control limits.
b. Based on your answer in part a, is your process in control?
c. If your answer to part b. is no, which sample(s) are considered assignable cause variation?
(there is no requirement to create a p chart)
Day Defects 1 6 2 13 3 1 4 14 5 13 6 10 7 7 8 3 9 13 10 11 11 16 12 4 13 6 14 13 15 18 16 20 17 2 18 12 19 17 20 8 21 11 22 20 23 19 24 6 25 8 26 19 27 20 28 9 29 20 30 9
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