Consider the data in Exercise 15-9. Calculate the sample standard deviation of all 60 measurements and compare

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Consider the data in Exercise 15-9. Calculate the sample standard deviation of all 60 measurements and compare this result to the estimate of σ obtained from your revised X̅ and R charts. Explain any differences.

Exercise 15-9

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

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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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