The purpose of an x-bar chart is to determine whether there has been a:
A) change in the dispersion of the process output.
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 AOQ.

Question

Quizplus · Accepted Answer

X-bar chart is used to monitor the central tendency of a process output. It helps to identify whether there has been a shift in the mean or not. The chart plots the sample means, and the control limits are based on the process variation. Hence, any point outside those limits signals a significant change in the central tendency of the process output.

The Purpose of an X-Bar Chart Is to Determine Whether