You are involved in manufacturing ball bearings using lathe machines. The ball bearings should have a diameter of 5.0 cms - allowable control limits are 4.95 cms to 5.05 cms. Measurements made after the end of the process for the bearings produced are: 4.96, 4.98, 5.01, 5.03, 5.02, 5.01,5.03,5.04, 5.02, 4.96, 4.98, 5.00.