Question: 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

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 B4s and B3s, where B4 and B3 are found in Table 14-2 in this section. Construct an s chart for the data of Table 14-1. Compare the result to the R chart given in Example 3.

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