If you had a normally-distributed process with some average (x-bar) and some standard deviation (s), how would you find the expected percentage that would be above (or below) a certain point of interest? Group of answer choices You would calculate the population arithmetic mean You would calculate the population sigma You would calculate a Z score and then you would look up in the Z table to see what percentage would be expected above (or below) a certain point You would use a fractional factorial with the resolution IV