Question: The R - chart A . is used to indicate gains or losses in dispersion. B . is used to measure changes in the central

The R-chart
A. is used to indicate gains or losses in dispersion.
B. is used to measure changes in the central tendency.
C. control limits are computed using sample standard deviations.
D. generally uses control limits set at plus or minus 2 standard deviations of the distribution, rather than plus or minus 3, which is commonly used on the x-bar ch
 The R-chart A. is used to indicate gains or losses in

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