Question: Please find the upper and lower control limits Auto pistons at Wemming Chung's plant in Shanghai are produced in a forging process, and the diameter

Please find the upper and lower control limits

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 1 2 Mean x (mm) 156.9 151.2 151.6 157.5 156.6 Range R (mm) 4.4 4.6 4.1 5.2 4.3 3 4 5 a) What is the value of ? = x= 154.76 mm (round your response to two decimal places). b) What is the value of R? R = 4.52 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)

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