The Quality Assurance Department selected a sample of 12 printed circuit boards and tested them. The number of defects in each circuit board was 3, 3, 0, 5, 1, 1, 5, 6, 6, 2, 0, and 1. What kind of control chart should be constructed to monitor the process?
A) Mean chart
B) Range chart
C) Percent defective chart
D) C-bar chart

Question

Quizplus · Accepted Answer

A C-bar chart is appropriate for monitoring the number of defects per unit when the sample size is constant, as in this case with 12 circuit boards.

The Quality Assurance Department Selected a Sample of 12 Printed