Question: Question 4. Control Charts for Attributes Surface defects have been counted on 25 rectangular steel plates, and the data are shown in Table 4.

Question 4. Control Charts for Attributes Surface defects have been counted on 25 rectangular steel plates, and the data are shown in Table 4. Set up a control chart for nonconformities using these data. Does the process of producing the plates appear to be in statistical control? Table 4 Plate Number of Number Nonconformities Number Plate Number of Nonconformities 1 1 14 0 2 0 15 2 3 4 16 1 4 3 17 3 5 1 18 5 6 2 19 4 7 5 20 6 8 0 21 3 9 2 22 1 10 1 23 0 11 1 24 2 12 0 25 4 13 8 1 Mark * Use Excel to plot the control chart and insert it in the space provided below. 0.10 marks for chart formatting; 0.50 Control Chart; 0.40 Explanation

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