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The Process xˉ \bar{x} And R-Charts Are Developed Using a Sample Size of 5

Question 157

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The process xˉ \bar{x} and R-charts are developed using a sample size of 5, but the technician mistakenly looks up A2, D3, and D4 values for a sample size of 7. If these charts are put into daily use, the manufacturer will mistakenly ship more bad product than had the charts been constructed correctly.

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