private void getZScoreStandarDesviation()
        {
            List <double> numbers           = getNumbersList(elementsToAnalyse);
            double        average           = Stadistic.getAverage(numbers);
            double        standarDesviation = Stadistic.getStandarDesviation(numbers);

            for (int i = 0; i < numbers.Count; i++)
            {
                numbers[i] = (numbers[i] - average) / standarDesviation;
                tablaPrincipal.Rows[i].Cells[columnIndex].Value = numbers[i].ToString();
            }
        }