@janety0312 I got 1.29. This is poorly worded question but it is also very representative of the type of questions organizations ask on BB/GB cert tests. The question you need to ask yourself is what does a spread of 22 units mean. I took it that it meant +/- 6 standard deviations so you divide by 6. That means the standard deviation is 3.6. The mean is skewed towards the Lower Spec Limit so you are calculating Cpk to the LSL.

94-80/3(3.6)

14/10.8 = 1.296 or 1.3

All that assumes that spread means +/- 6. If spead means +/- 3 then you are wasting your time doing a Cpk calculation and need to fix something.

@cseider Half the issue on taking these certification exams is being able to figure out what they are asking.

To that note I know a person who, in one day, passed 3 certification tests for BB and 1 for MBB.