. The average inside diameter of a sample of 2,000 washers produced by a machine is 0.550 inches with a standard deviation of 0.007 inches. These washers are manufactured with a maximum allowable tolerance in the diameter from 0.529 to 0.571 inches; otherwise, the washers are considered defective. Determine the number of defective washers

EBK ELECTRICAL WIRING RESIDENTIAL
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ISBN:9781337516549
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Chapter29: Service-entrance Calculations
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16. The average inside diameter of a sample of 2,000 washers produced by a machine is 0.550 inches with a standard deviation of 0.007 inches. These washers are manufactured with a maximum allowable tolerance in the diameter from 0.529 to 0.571 inches; otherwise, the washers are considered defective. Determine the number of defective washers produced by the machine, assuming that the diameters are normally distributed. (Round off your answer in whole number and without unit)

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