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Glossary “Z” Definition of Terms in DataMyte
Z-distribution
Used for a sample size of n drawn from a normal distribution with mean µ and standard deviation σ. Used to determine the area under the normal curve.
Z-test
A test of a statistical hypothesis that the population mean µ is equal to the sample mean x̄ when the population standard deviation is known.
Zmax /3
The greater result of the formula when calculating CpK. Shows the distance from the tail of the distribution to the specification which shows the greatest capability
Zmin /3
See CpK.
Zupper
Identifies the number of standard deviations between the upper spec limit and the mean.