Question: Question Help Refer to Table 56.1 - Factors for Computing Control Chart Limits (3 sigma) for this problem Auto pistons at Wemming Chung's plant in

Question Help Refer to Table 56.1 - Factors for

Question Help Refer to Table 56.1 - Factors for Computing Control Chart Limits (3 sigma) for this problem 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: Modules Day 1 2 3 4 5 Mean x (mm) 158.9 155.2 155.6 153.5 158.6 Range R (mm) 44 4.6 3.9 5.0 4.7 prred rary a) What is the value of x ? b) What is the value of R? c) What are the UCL and LCL,, using 3o? Plot the data. d) What are the UCLR and LCL R, using 30? Plot the data. e) If the true diameter mean should be 155 mm and you want this as your center (nominal) line, what are the new UCL, and LCL

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