The width of a bronze bar is intended to be one-eighth of an inch (0.125 inches). Inspection samples contain five bars each. The average range of these samples is 0.01 inches
What are the upper and lower control limits for the x-bar and R-chart for this process, using 3-sigma limits?
x-bar chart: LCL = .119; UCL =.131. R-chart: LCL = 0.0; UCL =.021
Business
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