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

Refer to Table 56.1 - Factors for Computing Control Chart Limits (3 sigmo) 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: Meanx Range R (mm) (mm) 158.9 153.2 151.6 153.5 5 158,6 4.7 Day 1 2 3 4 4.0 4.8 39 50 a) What is the value of x2 mm (round your response to two decimal placea)

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