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.

Central Tendency

A statistical measure that identifies a single value as representative of an entire distribution of data, commonly using the mean, median, or mode.

X-bar Chart

A type of control chart used in statistical process control for monitoring the mean values of a sample over time to detect any significant process changes.