Estimadores poblacionales

estimadores.java

private double[] getValues() {
    return new double[]{ 100, 115, 70, 115, 75, 80, 100, 90, 100, 95 };
}

@Test
public void calculateEstimatedParameters() {
    double[] values = getValues();
    double sum = 0D;
    for (double value : values) {
        sum += value;
    }
    double mean = sum / values.length;
    double variance = 1D / new Double(values.length - 1) * (summary(values) - values.length * Math.pow(mean, 2));
    System.out.println("Media: " + mean);
    System.out.println("Varianza: " + variance);
    System.out.println("Desvío: " + Math.sqrt(variance));
}

private double summary(double[] values) {
    double sum = 0D;
    for (double value : values) {
        sum += Math.pow(value, 2);
    }
    return sum;
}

What a gross person!