    def calculate_median_score
      # Read our numbers and sort them first
      sorted_scores = @data.map { |el| el['score'].to_f }.sort
      len = sorted_scores.length
      @median_score = len % 2 == 1 ? sorted_scores[len / 2] : (sorted_scores[len / 2 - 1] + sorted_scores[len / 2]).to_f / 2
    end
