Computer upgrades have a nominal time of 80 minutes. Samples of five observations each have been taken,
Question:
Computer upgrades have a nominal time of 80 minutes. 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 in control.
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Number of observations
n = 5 A^2 = .58 lower control limit D3 = 0 upper control limit D4 = 2.11
Please show all calculations/steps/formulas... I have answers if it helps
Mean: LCL is 78.88 UCL is 81.04
Range: LCL is 0 cm uCL is 3.95
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Now first calculate the range and mean of each samples then calculate the average range and mean of ...View the full answer
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