Question: Surface defects have been counted on 25 rectangular steel plates, and the data are shown in Table 6E.9. Set up a control chart for nonconformities

Surface defects have been counted on 25 rectangular steel plates, and the data are shown in Table 6E.9. Set up a control chart for nonconformities using these data. Does the process producing the plates appear to be in statistical control?

Plate Number ofPlate Number of Number Nonconformities Number Nonconformities 14 15 16 17 18 19 20 21 23 24 25 10 12 13

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