Question: A machine is designed to produce thread with a mean thickness of 0.56 mm. A sample of 49 pieces is found to have a mean

A machine is designed to produce thread with a mean thickness of 0.56 mm. A sample of 49 pieces is found to have a mean thickness of 0.552 mm with a sample standard deviation of 0.035 mm. test the claim that the mean thickness is 0.56 using a=.05

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