@Override public double conf(double totalExampleWeight,double delta){
  double inverseNormal=inverseNormal(1 - delta / 4);
  return inverseNormal / Math.sqrt(totalExampleWeight) + Math.pow(inverseNormal,2.0d) / (4.0d * totalExampleWeight);
}

@ Override public double conf ( double totalExampleWeight , double delta ) { double inverseNormal = inverseNormal ( 1 - delta / 4 ) ; return inverseNormal / Math . sqrt ( totalExampleWeight ) + Math . pow ( inverseNormal , 2.0d ) / ( 4.0d * totalExampleWeight ) ; }
calculate confidence intervall without a specific rule .
