Niel wants to estimate the Cpk for a soft drinks bottling plant. LSL & USL given by the customer is 299 ml & 301 ml. The average measured for the process is 300.78 ml with a standard deviation of:
a. 0.067 ml
b. 1.69 ml
c. 1.39 ml
d. 1.09 ml
e. 1.89 ml