Question: 1 5 . Control charts on and R for samples of size n = 5 are to be maintained on the tensile strength in pounds

15. Control charts on and R for samples of size n =5 are to be maintained on the tensile
strength in pounds of a yarn. To start the charts, 30 samples were selected, and the mean
and range of each computed. This yields
(a) Compute the center line and control limits for the and R control charts.

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