Question: Surface defects have been counted on 25 rectangular steel plates, and the data are shown below. Set up a control chart. Does the process producing

Surface defects have been counted on 25 rectangular steel plates, and the data are shown below. Set up a control chart. Does the process producing the plates appear to be in statistical control?

Plate Number Number of Defects Plate Number 14 Number of Defects 4

Plate Number Number of Defects Plate Number 14 Number of Defects 4 10 11 12 2343-25025-7 123 56989 15 16 9226 17 1 18 5 19 4 20 6 21 22 23 1 24 31024 7 25 13 8

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