PCI (process - capability index) = upper specification minus lower specification limit divided by six Sigma product standard deviation.

QUESTION 15 A bottle water filling process has a lower specification limit of 17.9 oz. and an upper specification limit of 18.2 oz. The standard deviation is 0.1 oz., and the average is 18 oz. What is the process capability index Cpk for the process? (note: please follow the definition of the process capability index in the lecture note) O 0.33 O 0.67 O 1.33 0 1