code: def calc_deviation(values, average):
      
      size = len(values)
      if size < 2:
          return 0
      calc_sum = 0.0
  
      for number in range(0, size):
          calc_sum += math.sqrt((values[number] - average) ** 2)
      return math.sqrt((1.0 / (size - 1)) * (calc_sum / size))
docs: Calculate the standard deviation of a list of values
      @param values: list(float)
      @param average:
      @return: