Repeat Exercise 10, using the S chart in place of the R chart. In Exercise 10 a.
Question:
In Exercise 10
a. Compute the 3σ limits for the R chart. Is the variance out of control at any point? If so, delete the samples that are out of control and recomputed and .
b. Compute the 3σ limits for the chart. On the basis of the 3σ limits, is the process mean in control? If not, at what point is it first detected to be out of control?
c. On the basis of the Western Electric rules, is the process mean in control? If not, when is it first detected to be out of control?
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a The sample size is n 5 The upper and lower limits for the Schart a...View the full answer
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