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Five data entry operators work at the data processing department of the Royal Bank. Each day for 30 days, the number of defective records in
Five data entry operators work at the data processing department of the Royal Bank. Each day for 30 days, the number of defective records in a sample of 250 records typed by these operators has been noted, as follows: Sample No. Sample No. Sample No. No. Defective No. Defective No. Defective 18 11 17 21 7 5 12 12 22 5 16 13 23 19 4 4 14 7 24 10 1 1 15 13 25 1 1 6 16 10 26 T 12 17 4 27 12 4 18 28 19 12 29 6 10 16 20 3 30 13 Establish 30 upper and lower control limits. Why can the lower control limit not be a negative number? The industry standards for the upper and lower control limits are 0.10 and 0.01, respectively. What does this imply about Royal Bank's own standards
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