SOLID - SRP - PopulationStandardDeviation

GenerateReport.java

package com.leonardorifeli.article;

public class GenerateReport {

    public ArrayList<String> find() { }
    public ArrayList<String> proccess() { }
    public void print() { }

}

PopulationStandardDeviation.java

package com.leonardorifeli.article;

public class PopulationStandardDeviation {

    public double mean() { }
    public double calculate() { }
    public double deviationSumSquare() { }

}