'The inverse of the CDF link
Parameters
z : array-like
The value of the inverse of the link function at `p`
Returns
p : array
Mean probabilities.  The value of the inverse of CDF link of `z`
Notes
g^(-1)(`z`) = `dbn`.cdf(`z`)'

def inverse(self, z):

    return self.dbn.cdf(z)
