Histograms for Scale Variables

  1. Open the Frequencies dialog box again.
  2. Click Charts.
  3. Select Histograms and With normal curve.
  4. Click Continue, and then click OK in the main dialog box to run the procedure.
Figure 1. Histogram
Histogram shown in Viewer

The majority of cases are clustered at the lower end of the scale, with most falling below 100,000. There are, however, a few cases in the 500,000 range and beyond (too few to even be visible without modifying the histogram). These high values for only a few cases have a significant effect on the mean but little or no effect on the median, making the median a better indicator of central tendency in this example.