Auto pistons at yongpin zhou’s plant in shanghai are produced in a
S6.7: Auto pistons at Yongpin Zhou’s plant in Shanghai are produced in a forging process, and the diameter is a critical factor that must be controlled. From sample sizes of 10 pistons produced each day, the mean the range of this diameter have been as follows: Day Mean (mm) Range(mm) 1 156.9 4.2 2 153.2 4.6 3 153.6 4.1 4 155.5 5 5 156.6 4.5 […]