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2)A random sample of 20 pumpkins is obtained and the mean circumference is found to be 40.5 cm. Assuming that the sample standard deviation is

2)A random sample of 20 pumpkins is obtained and the mean circumference is found to be 40.5 cm. Assuming that the sample 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 39.7 cm.

draw bell-curve and show work

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