code: def get_Zstar(x_segment, y_segment, x_int, y_int, slope, n):
      
      total = 0
      first_time = True
      for num, x in enumerate(x_segment):
          b_wiggle = get_b_wiggle(x, y_segment[num], y_int)
          result = 100 * ( old_div((x * abs(b_wiggle - abs(slope)) ), abs(y_int)) )
          total += result
          first_time = False
      Zstar = (old_div(1., (n - 1.))) * total
      return Zstar
docs: input: x_segment, y_segment, x_int, y_int, slope, n
      output: Z* (Arai plot zigzag parameter (alternate))