Jack Joyner, Director of Quality Control at Covington Castings (CC), is designing a c chart to monitor the number of nonconformances per aluminum casting produced at CC.The total number of nonconformances for 26 castings is 91.The centerline for Jack's c chart is ___________.
A)117.00
B)0.2857
C)3.50
D)65.00
E)26.00

Question

Quizplus · Accepted Answer

The c chart centerline is calculated as the average number of nonconformances per casting, which is the total number of nonconformances divided by the number of castings:

Centerline = Total number of nonconformances / Number of castings
Centerline = 91 / 26
Centerline = 3.50 (rounded to two decimal places)

Therefore, the correct answer is (C) 3.50.