s Chart In this section we described control charts for R and x based on ranges. Control
Chapter 14, Problem 13(choose chapter or problem)
s Chart In this section we described control charts for R and x based on ranges. Control charts for monitoring variation and center (mean) can also be based on standard deviations. An s chart for monitoring variation is constructed by plotting sample standard deviations with a centerline at s (the mean of the sample standard deviations) and control limits at B 4 s and B 3 s , where B 4 and B 3 are found in Table 142 in this section. Construct an s chart for the data of Table 141. Compare the result to the R chart given in Example 3
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