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According to industry specifications, the standard deviation of gasket thicknesses for a given application must be...

According to industry specifications, the standard deviation of gasket thicknesses for a given application must be no more than 3 thousandths of an inch. In a random sample of 25 gaskets produced by one of the firms, the sample standard deviation is found to be 3.7 thousandths of an inch. Assuming the population of thicknesses is normally distributed, and using alpha equal 0.025, examine whether the firm could be in violation of the industry specification

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