cumulative probability of a standard normal distribution
The erf command computes the cumulative probability (probability that a variate assumes a value less than or equal to z) for a standard normal distribution (that is, with mean 0 and variance 1).
Other normal distributions can be modeled by re-normalizing (that is, erf((z-m)/s) is the probability distribution of a normal distribution with mean m and standard deviation s).
Note that this is not the same as Maple's top-level erf command. It is synonymous with Statistics:-CDF( Normal(0,1), z, 'numeric').
The MapleTA[Builtin][erf] command was introduced in Maple 18.
For more information on Maple 18 changes, see Updates in Maple 18.
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