Seven samples of five parts each have been collected from an extrusion process that is in statistical control, and the diameter of the extrudate has been measured for each part. (a) Determine the values of the center, I.CL, and UCL for x and R charts. The calculated values of .2 and R for each sample arc given below (measured values are in inches). (h) Construct the control charts and plot the sample data on the charts.
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