Software upgrade times (in minutes) are being evaluated. Samples of five observations each have been taken,...

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Software upgrade times (in minutes) are being evaluated. Samples of five observations each have been taken, and the results are as listed SAMPLE 主 78.9 79.2 78.8 s0.e 78.4 81.e 8e.5 78.7 81.0 80.4 se.1 79.6 80.5 79.6 80.4 se.8 79.7 79.6 79.4 79.7 79.4 s0.6 80.5 8e.0 81.1 80,4 80.3 80.8 80.6 78.8 Factors for three-sigma control limits for x and R charts Number of Observations FACTORS FORR CHARTS Upper Control Lower Factor for Control x Chart, in Subgroup, Limit, D3 Limit, A2 n D4 2 1.88 3.27 3 1.02 2.57 4 0.73 2.28 0.58 2.11 0.48 2.00 0.42 e.08 1.92 0.37 0.14 1.86 9. 0.34 е.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 15 0.22 0.35 1.65 16 0.21 0.36 1.64 17 0.20 е.38 1.62 18 е.19 0.39 1.61 19 0.19 0.40 1.60 20 0.18 0.41 1.59 678 a. Using factors from above table, determine upper and lower control limits for mean and range charts. (Round your intermediate calculations and final answers to 2 decimal places. Leave no cells blank - be certain to enter "0" wherever required.) Mean Chart Range Chart UCL LCL b. Decide if the process is in control. O The process is in control. O The process is not in control Software upgrade times (in minutes) are being evaluated. Samples of five observations each have been taken, and the results are as listed SAMPLE 主 78.9 79.2 78.8 s0.e 78.4 81.e 8e.5 78.7 81.0 80.4 se.1 79.6 80.5 79.6 80.4 se.8 79.7 79.6 79.4 79.7 79.4 s0.6 80.5 8e.0 81.1 80,4 80.3 80.8 80.6 78.8 Factors for three-sigma control limits for x and R charts Number of Observations FACTORS FORR CHARTS Upper Control Lower Factor for Control x Chart, in Subgroup, Limit, D3 Limit, A2 n D4 2 1.88 3.27 3 1.02 2.57 4 0.73 2.28 0.58 2.11 0.48 2.00 0.42 e.08 1.92 0.37 0.14 1.86 9. 0.34 е.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 15 0.22 0.35 1.65 16 0.21 0.36 1.64 17 0.20 е.38 1.62 18 е.19 0.39 1.61 19 0.19 0.40 1.60 20 0.18 0.41 1.59 678 a. Using factors from above table, determine upper and lower control limits for mean and range charts. (Round your intermediate calculations and final answers to 2 decimal places. Leave no cells blank - be certain to enter "0" wherever required.) Mean Chart Range Chart UCL LCL b. Decide if the process is in control. O The process is in control. O The process is not in control

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Solution To calculate the control limits for 3sigma X bar chart and Rchart Mean Xbar and Range R nee... View the full answer