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Suppose a batch of metal shafts produced in a manufacturing company have a variance of 6.25...

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Statistics

Suppose a batch of metal shafts produced in a manufacturingcompany have a variance of 6.25 and a mean diameter of 206inches.

If 90 shafts are sampled at random from the batch, what is theprobability that the mean diameter of the sample shafts woulddiffer from the population mean by less than 0.3 inches? Round youranswer to four decimal places.

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