Compute the center line and control limits

Reference no: EM131102266

Control charts on andRfor samples of sizen=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

width=

(a) Compute the center line and control limits for the width= andRcontrol charts.

(b) Suppose both charts exhibit control. There is a single lower specification limit of 16 lb. If strength is normally distributed, what fraction of yarn would fail to meet specifications?

Reference no: EM131102266

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