In establishing control limits for $\bar { X }$ charts:
A) $\bar { R }$ is used in the estimation of ?.
B)a two-standard deviation range is typical.
C) is the center line.
D)the range between limits is independent of sample size.

Question

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The Answer of In establishing control limits for $\bar { X }$ charts:
A) $\bar { R }$ is used in the estimation of ?.
B)a two-standard deviation range is typical.
C) is the center line.
D)the range between limits is independent of sample size.

In Establishing Control Limits For Xˉ\bar { X }Xˉ Charts: A) Rˉ\bar { R }Rˉ

In Establishing Control Limits For $\bar { X }$ Charts:
A) $\bar { R }$