The c-chart is useful when we
A)take a number of measurements and compute the average.
B)take a number of measurements and compute the ranges.
C)find the fraction of the production lot defective.
D)find the number of defective items in a production lot.

Question

Quizplus · Accepted Answer

The c-chart is used for controlling the number of defects (nonconformities) in a production lot, not for averages, ranges, or fractions of defective items.

The C-Chart Is Useful When We