Question: 1. A process is monitored for defective items by taking a sample of 250 items each day and calculating the proportion that are defective. Let

1. A process is monitored for defective items by taking a sample of 250 items each day and calculating the proportion that are defective. Let pi be the proportion of defective items in the ith sample. For the last 50 samples, the sum of the proportions is 50 i=1 pi = 2.98. Calculate the center line and the 3σ upper and lower control limits for a p chart.

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