question: @ Override public double conf ( double totalWeight , double delta ) { double inverseNormal = inverseNormal ( 1 - delta / 4 ) ; return Math . sqrt ( inverseNormal / ( 2 * Math . sqrt ( totalWeight ) ) ) + inverseNormal / ( 2 * Math . sqrt ( totalWeight ) ) + Math . pow ( inverseNormal / ( 2 * Math . sqrt ( totalWeight ) ) , 1.5d ) ; }
target:  Calculate confidence intervall without a specific rule 