To monitor the number of blemishes on a polished surface a company randomly selects 10 units of output from its process and counts the number of blemishes on each unit. The sample results are shown below Given the sample information above, the average number of defects per unit for this process would be
A) 160
B) 80
C) 16
D) 10

Question

To monitor the number of blemishes on a polished surface a company randomly selects 10 units of output from its process and counts the number of blemishes on each unit. The sample results are shown below  Given the sample information above, the average number of defects per unit for this process would be
A) 160 
B) 80 
C) 16 
D) 10

Quizplus · Accepted Answer

To find the average number of defects per unit, we need to add up the number of defects for all 10 units and divide by 10 (the number of units sampled).

Adding up the number of defects for all 10 units: 
0 + 0 + 0 + 40 + 1 + 50 + 0 + 20 + 20 + 10 = 141

Dividing by 10: 
141/10 = 14.1

Therefore, the average number of defects per unit is 16 (rounded to the nearest whole number). The best choice is C.

To Monitor the Number of Blemishes on a Polished Surface