Question: QUESTION 6 0.08 This is a second half question. Your company is setting up x-bar and R-charts to control a process. In preparation, a total

QUESTION 6 0.08 This is a second half question.

QUESTION 6 0.08 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 R was 14. Calculate the upper and lower control limits for each chart. Number of Factors for R chart Observations Factor for Lower Control Upper Control in Sample X-bar Chart Limit Limit A2 D3 D4 1.88 3.27 1.02 2.57 0.73 2.28 0.58 2.11 0.48 2.00 0.42 1.92 0.37 1.86 0.34 1.82 0.31 1.78 0.29 1.74 0.27 1.72 0.25 0.31 1.69 1.67 1.65 0.21 0.36 1.64 0.20 0.38 1.62 0.19 1.61 0.19 0.40 1.60 0.18 0.41 1.59 Oooooooo 0.24 0.22 0.39

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