         sample_size:   1
       }
 
-      iex> Benchee.Statistics.job_statistics([], :run_time)
+      iex> Benchee.Statistics.job_statistics([])
       %Benchee.Statistics{
         average:       nil,
         ips:           nil,

        sample_size:   9
      }

      iex> Benchee.Statistics.job_statistics([100], :run_time)
      %Benchee.Statistics{
        average:       100.0,
        ips:           10_000.0,
        std_dev:       0,
        std_dev_ratio: 0.0,
        std_dev_ips:   0.0,
        median:        100.0,
        percentiles:   %{50 => 100.0, 99 => 100.0},
        mode:          nil,


    %__MODULE__{
      average: average,
      std_dev: deviation,
      std_dev_ratio: standard_dev_ratio,
      median: median,
      percentiles: percentiles,
      mode: mode,
