Kelly’s machine shop uses a machine-controlled metal saw to cut sections of tubing used in pressure-measuring devices. The length of the sections is normally distributed with a standard deviation of 0.06″. Twenty-fi ve pieces have been cut with the machine set to cut sections 5.00″long. When these pieces were measured, their mean length was found to be 4.97″. Use prob values to determine whether the machine should be recalibrated because the mean length is signifi cantly different from 5.00″?
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