Question: The R - chart A . is used to indicate gains or losses in dispersion. B . is used to measure changes in the central
The 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 standard deviations of the distribution, rather than plus or minus which is commonly used on the bar ch
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