Question: Computer upgrade times ( in minutes) are being evaluated. Samples of five observations each have been taken, and the results are as listed. Using factors

Computer upgrade times ( in minutes) are being evaluated. Samples of five observations each have been taken, and the results are as listed. Using factors from Table, determine upper and lower control limits for mean and range charts, and decide if the process is incontrol.

SAMPLE 2 3 6 79.2 80.5 79.6 78.9 80.5 79.7 78.8 78.7 79.6 79.4 79.6 80.6 80.0 81.0 80.4 79.7 80.4 80.5 78.4 80.4 80.3 79.4 80.8 80.0 81.0 80.1 80.8 80.6 78.8 81.1

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