public double rawPersonMaximum(int index){
        if(!this.dataPreprocessed)this.preprocessData();
        if(index<1 || index>this.nItems)throw new IllegalArgumentException("The person index, " + index + ", must lie between 1 and the number of persons," + this.nPersons + ", inclusive");
        if(!this.variancesCalculated)this.meansAndVariances();
        return this.rawPersonMaxima[index-1];
    }