Marble Inc. makes countertops from a variety of high-end materials. To monitor the quality of its production processes the company randomly selects one countertop and counts the number of blemishes. The results for ten samples 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

Marble Inc. makes countertops from a variety of high-end materials. To monitor the quality of its production processes the company randomly selects one countertop and counts the number of blemishes. The results for ten samples 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 calculate the mean of the given sample data. Adding up the number of defects for each sample, we get: 12+8+15+13+18+7+9+11+14+16 = 123. Dividing by the number of samples (10), we get an average of 12.3 defects per unit. However, the question asks for the average rounded to the nearest whole number, which is 16 (since 0.3 rounds up). Therefore, the best choice is C, with an average of 16 defects per unit.