Phillips Systems Phillips Systems is an Ohio-based company that makes parts for the automo tive industry. One part is a bolt used in the engine manifold system The company has two machine that make these bolts. It is well established that the standard deviation for bolts made by machine on is 0.025 inches and the standard deviation for machine two is 0.034 inches At question s whether machine 2 also provides bolts with higher average diameters. To test this, you can use these steps