As a quality-control inspector on a production line, you monitor the frequency of errors made in the production process. The chart below shows the average frequency
of errors during the past week. What was the average frequency of errors per day?
errors per 1,000 pieces
15-
1.Ill
M T W Th F
day
O A
OB.
O C.
D.
E
O
11.6 per 1,000
12.0 per 1,000
13.0 per 1,000
14.0 per 1,000
15.0 per 1,000