Boyd Tooling Has an Automated Drilling Machine and the Owners

Multiple Choice

Boyd Tooling has an automated drilling machine and the owners want to determine the equipment's capability for machining a part's diameter to a specification of 0.350 ± 0.004 inches. After a trial run period, the lathe produced a sample mean of 0.351 inches, with a standard deviation of 0.0009 inch. Calculate the C_pk for this drilling machine.

A) 1.48
B) 0.83
C) 1.33
D) 1.00
E) 1.85