Question: 3. Quality Control Problem: Factors for three-sigma control limits for and R charts FACTORS PORR Number of Factor Subgroup, 0.48 0.37 0.27 1.64 0.20 0.38

3. Quality Control Problem: Factors for three-sigma control limits for and R charts FACTORS PORR Number of Factor Subgroup, 0.48 0.37 0.27 1.64 0.20 0.38 0.19 0.18 0.40 0.41 1.60 1.59 20 Samples of five observations taken and the results are as listed: 1 79. 2 80. 3 79. 4 78. 5 80. 6 79. 78. 78. 79. 79 79, 80 80. 81. 80. 79. 80. 80. 78. 80. 80. 79, 80 80 81. 80. 80. 80. 78. 81. A. Using factors from above table determine upper and lower control limits for mean and range, the draw the X-chart & R-chart. B. Decide if the process is in control

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