Inventory control records are cycle-counted for errors

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Reference no: EM132292630

Each day 450 inventory control records are cycle-counted for errors. These counts have been made over a period of 18 days and have resulted in the following proportion of records found in error each day: Day Proportion Found Defective 1 .0019 2 .0160 3 .0040 4 .0050 5 .0250 6 .0100 7 .0135 8 .0025 9 .0050 10 .0070 11 .0120 12 .0260 13 .0130 14 .0230 15 .0080 16 .0190 17 .0100 18 .0025 a. Calculate the center line, upper control limit, and the lower control limit for a p control chart. Show your work. You can use any symbol you want for a square root sign as long as you provide a key. Or your cell formulas, if using Excel, will show your work. b. Create a P chart, showing the center line and the upper and lower control limits (along with their computed values). Then plot the 18 data points on the chart. c. Is this process stable enough to keep going? State why or why not and specify which points are not in control, if any.

Reference no: EM132292630

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