Which of the following is true of a p-chart?
A) The lower control limit is found by subtracting a fraction from the average number of defects.
B) The lower control limit indicates the minimum acceptable number of defects.
C) The lower control limit equals D₃ times p-bar.
D) The lower control limit may be at zero.
E) The lower control limit is the same as the lot tolerance percent defective.

Question

Quizplus · Accepted Answer

The lower control limit (LCL) of a p-chart can be at zero if the calculated LCL is negative, as the number of defects cannot be negative.

Which of the Following Is True of a P-Chart