The usual purpose of an R-chart is to signal whether there has been a:
A) gain or loss in dispersion.
B) change in the percent defective in a sample.
C) change in the central tendency of the process output.
D) change in the number of defects in a sample.
E) change in the consumer's risk.

Question

Quizplus · Accepted Answer

The R-chart is used to monitor the variability or dispersion of a process. It tracks the range (R) of a sample and detects changes in dispersion. If there has been a gain or loss in dispersion, the R-chart will signal that there is a problem in the process.

The Usual Purpose of an R-Chart Is to Signal Whether