Question: This is a second half question. Your company is setting up x-bar and R-charts to control a process. In preparation, a total of 15 samples,

This is a second half question. Your company is setting up x-bar and R-charts to control a process. In preparation, a total of 15 samples, were taken, each of size 20. The average x was equal to 273 and the average Rwas 14. Calculate the upper and lower control limits for each chart. Number of Observations Factor for Factors for R chart Lower Control Upper Control Limit Limit in Sample X-bar Chart n A2 D3 D4 2 0 3.27 1.88 1.02 3 0 2.57 4 0.73 0 2.28 5 0 2.11 6 0 2.00 7 0.58 0.48 0.42 0.37 0.34 0.08 1.92 8 0.14 1.86 9 0.18 1.82 10 0.31 0.22 1.78 11 0.29 0.26 1.74 12 0.27 0.28 1.72 13 0.25 0.31 1.69 14 0.24 0.33 1.67 14 0.24 0.33 1.67 15 0.22 0.35 1.65 16 0.21 0.36 1.64 17 0.20 0.38 1.62 18 0.19 0.39 1.61 ||| 19 0.19 0.40 1.60 20 0.18 0.41 159

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