Use the following table to answer the question(s) below.

-A manufacturer of FAX machines checks samples of 50 units for functionality at the conclusion of the assembly process. The results of 10 samples are shown below: What is the average proportion defective?
A) 0.07
B) 0.14
C) 0.21
D) 0.28
E) 0.35

Question

Use the following table to answer the question(s) below.
 
-A manufacturer of FAX machines checks samples of 50 units for functionality at the conclusion of the assembly process. The results of 10 samples are shown below: What is the average proportion defective?
A) 0.07 
B) 0.14 
C) 0.21 
D) 0.28 
E) 0.35

Quizplus · Accepted Answer

To find the average proportion defective, we need to add up the number of defective units in each sample and divide by the total number of units tested:

(1 + 1 + 3 + 0 + 2 + 1 + 2 + 1 + 1 + 1) / (50 x 10) = 14/500 = 0.028

Therefore, the average proportion defective is 0.028, which is equivalent to 0.14 (as a percentage). The correct choice is B.

Use the Following Table to Answer the Question(s) Below