The control chart most appropriate for data that represent the average number of packing slip errors per package shipped each day is the:
A)np-chart.
B)u-chart.
C)p-chart.
D)x-chart.

Question

Quizplus · Accepted Answer

The u-chart is the most appropriate control chart for continuous data that represent defects per unit (in this case, packing slip errors per package shipped). It takes into account the sample size for each unit, which can vary in this scenario, and is used when the data do not follow a normal distribution. The np-chart is used for discrete data with a fixed sample size, the p-chart is used for discrete data with a variable sample size, and the x-chart is used for continuous data with a fixed sample size.

The Control Chart Most Appropriate for Data That Represent the Average