Reconsider Exercise 15-4(a). Assuming that both charts exhibit statistical control and that the process specifications are at
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Reconsider Exercise 15-4(a). Assuming that both charts exhibit statistical control and that the process specifications are at 20 ± 5, estimate PCR and PCRk and interpret these ratios.
Data from 15-4
Samples of size n = 6 are collected from a process every hour. After 20 samples have been collected, we calculate x̅ = 20.0 and r̅ / d2 = 1.4.
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Related Book For 
Applied Statistics And Probability For Engineers
ISBN: 9781118539712
6th Edition
Authors: Douglas C. Montgomery, George C. Runger
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