Which of the following charts is used to monitor the average number of defects per unit when subgroup sizes vary?
A)s-chart
B)c-chart
C)p-chart
D)u-chart

Question

Quizplus · Accepted Answer

The u-chart is used to monitor when the subgroup sizes vary or aren't consistent. This is useful when tracking defects, as you want to know the average number of defects per unit, regardless of the subgroup size. The s-chart is used for monitoring the variability within subgroups, the c-chart is used for monitoring count data (such as the number of defects per sample), and the p-chart is used for monitoring proportions (such as the percentage of samples with defects).

Which of the Following Charts Is Used to Monitor the Average