The pull strength of a wire-bonded lead for an integrated circuit is monitored. The following table provides

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The pull strength of a wire-bonded lead for an integrated circuit is monitored. The following table provides data for 20 samples each of size 3.

Sample Number 15,3 15.4 15.6 15.4 17.1 15.2 3 16.1 16.1 13.5 4. 13.5 12.5 10.2 17.0 5 18.3 16.1 17.2 19.2 19.4 14.1 12.4


(a) Use all the data to determine trial control limits for X and R charts, construct the control limits, and plot the data.

(b) Use the control limits from part (a) to identify out-of-control points. If necessary, revise your control limits assuming that any samples that plot outside of the control limits can be eliminated.

(c) Repeat parts (a) and (b) for X and S charts.

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Applied Statistics And Probability For Engineers

ISBN: 9781118539712

6th Edition

Authors: Douglas C. Montgomery, George C. Runger

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