Question: 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

Refer to Table 56.1 - Factors for Computing

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: Day Range R (mm) 1 2 Mean x (mm) 154.9 155.2 155.6 157.5 156.6 3 4.2 4.4 4.1 5.2 4.7 4 5 a) What is the value of ? mm (round your response to two decimal places). b) What is the value of R? R= mm (round your response to two decimal places). c) What are the UCL, and LCL; using 3-sigma? mm (round your response to two decimal places). Upper Control Limit (UCL;) = Lower Control Limit (LCL;) - mm (round your response to two decimal places). d) What are the UCLR and LCLR using 3-sigma? Upper Control Limit (UCLR) = mm (round your response to two decimal places). Lower Control Limit (LCLR) = mm (round your response to two decimal places)

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