A manufacturer of a particular grade of copper tubing collects data on the number of flaws occurring in 500 metre coils. Suppose they sample a total of 40 coils to initiate control charting. The average number of defects per coil is 2.5. The appropriate control chart for these data is the
A) R chart.
B) c chart.
C) x-bar and R chart.
D) p chart.
E) ARL chart.

Question

Quizplus · Accepted Answer

The c chart is used for counting defects when the number of opportunities for defects is constant, as is the case with a fixed length of copper tubing (500 metre coils).

A Manufacturer of a Particular Grade of Copper Tubing Collects