Question: NOT EXCEL BY HAND PLEASE NOT EXCELL, BY HAND PLEASE. 1. A mean chart is used to maintain the diameter of plastic tubing. The process

NOT EXCEL BY HAND PLEASENOT EXCEL BY HAND PLEASE NOT EXCELL, BY HANDNOT EXCELL, BY HAND PLEASE.

1. A mean chart is used to maintain the diameter of plastic tubing. The process is known to have a standard deviation of 0.15cm. Five samples of three observations each are used to construct the mean chart and range chart. a Sample 1 2 3 4 5 1 10.0 10.1 9.8 9.9 9.8 Observations (centimeters) 2 3 9.9 10.0 10.1 10.3 10.0 10.1 9.9 9.8 9.9 9.9 - a) Compute x. b) Compute three-sigma limits for an x -chart. c) Compute R-charts. d) Is the process in-control? Why or why not

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