Which of the following charts is used to monitor the average number of nonconformances per unit when sample sizes vary?
A) $ \bar{x} $-chart
B)u-chart
C)p-chart
D)c-chart

Question

Quizplus · Accepted Answer

The u-chart is used to monitor the average number of nonconformances per unit when sample sizes vary. The $ \bar{x} $-chart is used to monitor the average of a continuous process, the p-chart is used to monitor the proportion (or percent) of nonconforming items in a sample, and the c-chart is used to monitor the count of nonconformities per unit when the sample size is constant.

Which of the Following Charts Is Used to Monitor the Average