Set up

System`

Statistics`ConfidenceIntervals`

Statistics`HypothesisTests`

Statistics`NormalDistribution`

The "p" in NormalPValue gives the area under the standard normal curve, but it goes to the left or right depending on whether z is negative or positive.

The left side of the previous figure is the same as this "CDF" ( CumulativeDistributionFunction ).

Created by Mathematica  (October 2, 2003)