In the past, a machine has produced washers having a thickness of 0.050 inch (in). To determine…

In the past, a machine has produced washers having a thickness of 0.050 inch (in). To determine…

In the past, a machine has produced washers having a thickness of 0.050 inch (in). To determine whether the machine is in proper working order, a sample of 10 washers is chosen, for which the mean thickness is 0.053 in and the standard deviation is 0.003 in. Test the hypothesis that the machine is in proper working order, using significance levels of (a) 0.05 and (b) 0.01.

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