Fifty samples of size 500 were drawn from a manufacturing process and the number of defectives in each sample was counted. The average of the sample proportion was 0.032. The centerline for the p chart is:
A) 0.032
B) 16.0
C) 0.512
D) 0.968
E) 4.2

Question

Quizplus · Accepted Answer

The centerline of a p chart represents the average proportion of defectives in the samples, which is given as 0.032.

Fifty Samples of Size 500 Were Drawn from a Manufacturing