The sample dataset PAPER.MTW t

The sample dataset PAPER.MTW that comes with the MINITAB software contains measurements on rolls of paper used by a large metropolitan newspaper. The engineer who inspects each roll of paper is especially concerned about small holes in the paper that are larger than 1 millimeter in diameter. The dataset contains 35 1.5 × 2 sections of paper, with each being sampled 6 times. There are thus 210 numbers, each of which represents the number of holes of at least 1 millimeter for the given section. Would it be reasonable to use the 210 counts to determine Phase I control limits for a c-chart? If so, what assumption(s) would you be making? Determine the control limits, using whatever method seems best in view of the small number of counts. Then test for control of the 210 measurements.

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