Chapter 6 s question 7, part c: Auto pistons at Wemming Chung'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 and the range of this diameter have been as follows: a) What is the value of x ? b) What is the value of R ? c) What are the UCL x and LCLx, using 3 ? Plot the data. d) What are the UCLR and LCLR, using 3 ? Plot the data. e) If the true diameter mean should be 155mm and you want this as your center (nominal) line, what are the new UCLx and LCLx? LCL=153.78,UCL=156.54 LCL=152.78,UCL=157.54 LCL=155.78,UL=159.54 LCL=154.78,UL=158.54 Cannot be estimated, sigma is needed