Question: A half dollar is considered to be defective if it deviates substantially from these specifications: The weight is 11.340 g, the diameter is 30.61 mm,

A half dollar is considered to be defective if it deviates substantially from these specifications: The weight is 11.340 g, the diameter is 30.61 mm, the thickness is 2.15 mm, the composition is 8.33% nickel and 91.67% copper, the edge has 150 reeds, and it is stamped correctly. For the same manufacturing process considered in this section, defects are monitored and the accompanying control chart is obtained. Does this process appear to be within statistical control? If not, identify any out-of-control criteria that are violated. Is the manufacturing process deteriorating?

UCL= 0.002 145 0.0020 0.0015 p=0.001135 0.0010 0.0005 LCL= 0.000125 0.0000 2 4 6 8 10 12 14 16 18 20 Sample

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