It is appropriate to use the X-mR-chart when:
A)The outcome variable is at the nominal level of measurement.
B)There is an unstable, fluctuating baseline pattern.
C)We want to increase statistical power.
D)All of these.

Question

Quizplus · Accepted Answer

The X-mR-chart is appropriate when there is an unstable, fluctuating baseline pattern, such as in a process where the mean or standard deviation changes over time. It is not intended for use with nominal data, and it does not increase statistical power.

It Is Appropriate to Use the X-MR-Chart When