quantileInt
Returns the quantile (inverse CDF) for the given probability p as an Int.
The quantile function returns the smallest integer k such that cdf(k) >= p. This is the type-safe integer variant — use quantile for Double compatibility with the Distribution interface.
Return
the smallest integer k at which cdf(k) >= p.
Parameters
p
the cumulative probability, must be in [0, 1].
Throws
if p is not in [0, 1].