public interface OutlierFilter {
    List<Double> filterOutliers(List<Double> inputs);
}

public class FilterNothingOutlierFilter implements OutlierFilter {
    public List<Double> filterOutliers(List<Double> inputs) {
        return inputs;
    }
}

public class StandardOutlierFilter implements OutlierFilter {
    public List<Double> filterOutliers(List<Double> inputs) {
        // TODO: implement stub
        return inputs;
    }
}

public class AggressiveOutlierFilter implements OutlierFilter {
    public List<Double> filterOutliers(List<Double> inputs) {
        // TODO: implement stub
        return inputs;
    }
}

public class Analyzer {

    private OutlierFilter filter;

    public Analyzer(OutlierFilter filter) {
        this.filter = filter;
    }

    public BasicStats analyze(List<Double> inputs) {
        List<Double> filteredInputs =
            filter.filterOutliers(inputs);
        // TODO: implement stub
        return null;
    }
    public static void main(String[] args) {
        List<Double> inputs = new ArrayList<>();
        inputs.add(1.2);
        inputs.add(3.6);
        inputs.add(2.1);
        inputs.add(14738.3);

        Analyzer analyzer1 =
            new Analyzer(new FilterNothingOutlierFilter());
        BasicStats stats1 = analyzer1.analyze(inputs);

        Analyzer analyzer2 =
            new Analyzer(new StandardOutlierFilter());
        BasicStats stats2 = analyzer2.analyze(inputs);

        Analyzer analyzer3 =
            new Analyzer(new AggressiveOutlierFilter());
        BasicStats stats3 = analyzer3.analyze(inputs);
    }
}