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Which One Is Answer Of This Question Of Operation Management!!!!

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Cartons of Plaster of Paris are supposed to weigh exactly 32 oz. Inspectors want to develop
process control charts. They take 5 samples of 6 boxes per sample and weigh them. Based on
the following data, what are the 3—sigma lower and upper control limits for the mean chart and the
range chart, respectively? Please keep two decimal places and select the best answers. Select one:
I a. [32.6, 35.96], [0, 1.12] O b. [33.95, 34.50], [0, 1.13]
O c. [34.01, 34.55], [0, 1.12] I d. [34.01, 34.55], [0.52, 2.52]
0 e. [33.3, 34.75], [0, 2.00] Operations Management