public static double quantile(double z,double m,double sd){
  return m + Math.sqrt(2.0) * sd * ErrorFunction.inverseErf(2.0 * z - 1.0);
}

public static double quantile ( double z , double m , double sd ) { return m + Math . sqrt ( 2.0 ) * sd * ErrorFunction . inverseErf ( 2.0 * z - 1.0 ) ; }
quantiles ( = inverse cumulative density function )
