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Mathematics, 09.10.2021 08:00 macwaters

The mean inside diameter of a sample of 300 washers produced by a machine is 0.492 inches and the standard deviation is 0.004 inches. The purpose for which these washers are intended allows a maximum tolerance in the diameter of 0.486 to 0.498 inches, otherwise the washers are considered defective. Determine the percentage of defective washers produced by the machine, assuming the diameters are normally distributed.

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