text: from Statistics.Proportion import proportion
  from Calculator.Subtraction import subtraction
  from Calculator.Multiplication import multiplication
  from Calculator.Division import division
  
  
  def var_pop_prop(data):
      prob_poss = proportion(data)
      prob_imposs = subtraction(prob_poss, 1)
      result = multiplication(prob_imposs, prob_poss)
      vpp = division(result, len(data))
      return vpp