1 Computer upgrades have a nominal time of 80 minutes. Samples of observations each have been tak…

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1 Computer upgrades have a nominal time of 80 minutes. Samples of observations each have been taken, and the results are as listed. Determine upper and lower control limits for mean and range charts, and decide if the process is in control 79.280.5 79.6 78.8 78.7 79.6 794 79.6 80.6 80.0 81.0 80.4 9.7 80.4 80.5 78.4 80.4 80.3 94 80.8 80.0 81.0 80.1 80.8 80.6 78.8 81.1 78.9 80.579.7

1 Computer upgrades have a nominal time of 80 minutes. Samples of observations each have been taken, and the results are as listed. Determine upper and lower control limits for mean and range charts, and decide if the process is in control 79.280.5 79.6 78.8 78.7 79.6 794 79.6 80.6 80.0 81.0 80.4 9.7 80.4 80.5 78.4 80.4 80.3 94 80.8 80.0 81.0 80.1 80.8 80.6 78.8 81.1 78.9 80.579.7

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