The value of the probability for this normal distribution, between 0 and 1.
accuracy
The precision of the returned result. For example, it this parameters is set to 0.01, then the result will be returned to three decimal places.
maximumSteps
The maximum number of steps which can be performed.
Remarks
This method returns the value of the upper bound of the
open half line over which the probability function is equal to a
given value. Within this method we allow the accuracy and the maximum
number of iteration used to be set.
For further explanation and explicit formulae please see the
accompanying PDF documentation.