text: from Statistics.PopulationMean import population_mean
  from Statistics.Sample_Standard_Deviation import sample_st_deviation
  from Calculator.Subtraction import subtraction
  from Calculator.Division import division
  
  
  def z_score(data):
      x = 62
      u = population_mean(data)
      sample_sd = sample_st_deviation(data)
      y = subtraction(x, u)
      return division(sample_sd, y)
  
  #this may not work