cumulativeProbability method
The Cumulative Distribution Function (CDF).
Returns the cumulative probability at x
, or the probability of a random
variable to be less than or equal to x
.
Implementation
@override
double cumulativeProbability(double x) =>
x < 0 ? 0 : 0.5 * (1 + erf((log(x) - mu) / (sqrt2 * sigma)));