public void CalculatePoissonSampleMeanTest()
        {
            //Arrange
            int[] numbers = new int[7] {
                1, 5, 5, 4, 2, 1, 5
            };

            //Act
            double result = ArrayHelper.CalculatePoissonSampleMean(numbers);

            //Assert
            Assert.AreEqual(Math.Round(result, 4), 3.2857);
        }