What do R charts measure?
A)The spread based on the range
B)The spread based on the standard deviation
C)The mean based on the range
D)The mean based on the standard deviation

Question

Quizplus · Accepted Answer

R charts measure the spread based on the range, which is calculated as the difference between the highest and smallest data points within a subgroup. The R chart helps to identify process variability and to monitor the stability of the process over time.

What Do R Charts Measure