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1. What are the units of the Z score for a process performance parameter?
Process standard deviations
Radians based upon the circular error associated with the process parameter
The process performance parameter characteristic
2. A Z score of 0.55 is transformed in the Z transformation table to a value of 0.2088. What does that value mean?
The process mean has shifted by 20.88%
70.88% of the process performance is below the value represented by that Z score
20.88% of the process performance is below the value represented by that Z score
3. What statistical measure can be used when directly comparing values from dissimilar distribution?
The Z score
The P value
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