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A random sample of 100 pumpkins is obtained and the mean circumference is found t…continues

A random sample of 100 pumpkins is obtained and the mean circumference is found to be 40.5 cm. Assuming that the population standard deviation is known to be 1.6 cm,use a 0.05 significance level to test the claim that the mean circumference of all pumpkins is equal to 39.9 cm.

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