A screw manufacturer produces screws that are supposed to be 0.125 inch in diameter. A screw is
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A screw manufacturer produces screws that are supposed to be 0.125 inch in diameter. A screw is deemed satisfactory if its diameter is between 0.124 inch and 0.126 inch. The company quality manager therefore uses an X̅ chart with a centerline of 0.125 inch, a UCL of 0.126 inch, and an LCL of 0.124 inch. Why is this incorrect?
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Related Book For
Managerial Statistics
ISBN: 9780534389314
1st Edition
Authors: S. Christian Albright, Wayne L. Winston, Christopher Zappe
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