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

-A parks and recreation worker counts the number of paint drips on each standard size park bench. The results from the last 10 benches are shown below. If the Parks Department decides to make a c chart, what should the center line be?
A) 6.9
B) 8.4
C) 9.2
D) 10.7
E) 11.3

Question

Use the following table to answer the question(s) below.
 
-A parks and recreation worker counts the number of paint drips on each standard size park bench. The results from the last 10 benches are shown below. If the Parks Department decides to make a c chart, what should the center line be?
A) 6.9 
B) 8.4 
C) 9.2 
D) 10.7 
E) 11.3

Quizplus · Accepted Answer

To calculate the center line of a c chart, we use the formula:
Center line = Total count of defects / Total number of samples
In this case, the total count of paint drips is 92 (8 + 12 + 10 + 7 + 11 + 9 + 7 + 9 + 7 + 12 = 92) and the total number of samples is 10. Therefore, the center line is:
Center line = 92/10 = 9.2. 
So, the best choice is C) 9.2.

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