public void ShortOrderMedian()
 {
     // -3 -1 -0.5 0  1  4 5 6 10
     var samples = new[] { -1, 5, 0, -3, 10, -0.5, 4, 1, 6 };
     Assert.That(samples.Median(), Is.EqualTo(1), "Median");
     Assert.That(Statistics.OrderStatistic(samples, 1), Is.EqualTo(-3), "Order-1");
     Assert.That(Statistics.OrderStatistic(samples, 3), Is.EqualTo(-0.5), "Order-3");
     Assert.That(Statistics.OrderStatistic(samples, 7), Is.EqualTo(5), "Order-7");
     Assert.That(Statistics.OrderStatistic(samples, 9), Is.EqualTo(10), "Order-9");
 }