Affects Version/s: None
Fix Version/s: 1.2
NormalDistributionImpl::cumulativeProbability(double x) throws ConvergenceException
if x deviates too much from the mean. For example, when x=+/-100, mean=0, sd=1.
Of course the value of the CDF is hard to evaluate in these cases,
but effectively it should be either zero or one.