Among other quality measures,the quality of an electronic component used in manufacturing stereo speakers is monitored with a p chart.In the last 25 days,daily samples of 60 units resulted in the following number of defective units per sample: 8,4,3,7,6,2,5,3,1,0,7,4,2,0,1,6,2,4,3,1,2,8,5,6,0.Determine the center line for this process.
A).06
B).03
C).001
D).056

Question

Quizplus · Accepted Answer

The center line for a p chart is calculated as the average proportion of defective units. The total number of defective units is 90, and the total number of units sampled is 1500 (25 days * 60 units). The average proportion defective is 90/1500 = 0.06.

Among Other Quality Measures,the Quality of an Electronic Component Used