quantile
Computes the quantile (inverse CDF) for the given cumulative probability.
Returns the smallest value x such that cdf(x) >= p. This is the inverse of the cumulative distribution function: given a probability, it returns the corresponding threshold value.
Return
the value x at which cdf(x) = p.
Parameters
p
the cumulative probability, must be in [0, 1].
Throws
if p is not in [0, 1].