A graph that displays computed means for a series of small random samples over a period of time is called a(n)_______.
A) $\bar { x }$ chart
B)R chart
C)p chart
D)c chart
E)S chart

Question

Quizplus · Accepted Answer

A $\bar{x}$ (pronounced x-bar) chart displays computed means for a series of small random samples over a period of time. This type of chart is commonly used in statistical process control to monitor the central tendency of a process. In contrast, R, p, c, and S charts are used to monitor other aspects of a process, such as variability or proportion. Thus, the best choice in this case is A, the $\bar{x}$ chart.

A Graph That Displays Computed Means for a Series of Small