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

Multiple Choice

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

-A machine shop owner wishes to monitor the diameter of an engine boring operation where the piston bore should be 4.25". He obtains 8 samples of 5 and records the data in the table above. What should the center line be for a chart that monitors process dispersion?

A) 0.50
B) 0.55
C) 0.60
D) 0.69
E) 0.80