Question: Refer to Table S6.1 - Factors for Computing Control Chart Limits (3 sigma) for this problem. Auto pistons at Wemming Chung's plant in Shanghai are

Refer to Table S6.1 - Factors for Computing

Refer to Table S6.1 - 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: . Mean x Range R Day (mm) (mm) 156.9 4.4 155.2 4.6 3 155.6 3.9 155.5 5.2 156.6 4.7 1 2 4 5 a) What is the value of ? XE mm (round your response to two decimal places). b) What is the value of R? = mm (round your response to two decimal places). c) What are the UCL; and LCL; using 3-sigma? Upper Control Limit (UCL ) = mm (round your response to two decimal places). Lower Control Limit (LCL;) = mm (round your response to two decimal places). d) What are the UCLR and LCLR using 3-sigma

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