A control chart that is used to monitor the range of the measurements in a sample is a(n) _____ chart.
A) p
B) x-bar
C) R
D) np

Question

Quizplus · Accepted Answer

A range chart (R chart) is used to monitor the variability or range of measurements within a sample. The other options (p chart, x-bar chart, and np chart) are all used to monitor different aspects of the sample data (proportions, means, and counts, respectively) but not the range.

A Control Chart That Is Used to Monitor the Range