Repeat Exercise 12, using the S chart in place of the R chart In Exercise 12 a Compute the 3 limits for the 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 3 limits for the chart On the basis of the 3 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

Question: Repeat Exercise 12, using the S chart in place of the R chart. In Exercise 12 a. Compute the 3 limits for the chart.

Repeat Exercise 12, using the S chart in place of the R chart.
In Exercise 12
a. Compute the 3σ limits for the 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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