An X chart uses a sample of size 3. The center line is at 200, and the
Question:
An X̅ chart uses a sample of size 3. The center line is at 200, and the upper and lower 3-sigma control limits are at 212 and 188, respectively.
(a) Estimate the process σ.
(b) Suppose that the process mean shifts to 195. Determine the probability that this shift is detected on the next sample.
(c) Find the ARL to detect the shift in part (b).
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a The difference UCL LCL 6 x 212 188 24 Therefore Therefore b P188 X ...View the full answer
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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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