A barbecue sauce producer sells their product in a 20 ounce bottle. Their current process mean is 19.80 ounces with a standard deviation of 0.3 ounces. If their tolerance limits are set at 20 ounces plus or minus 1 ounce,
a) What is the process capability index of the bottle filling process?
b) Using your answer to a, explain the capability f this process?