question: @ 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 ) ; }
target:  Calculate confidence intervall without a specific rule. 