Statistics Dictionary

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Histogram

A histogram is made up of columns plotted on a graph. Here is how to read a histogram.

  • The columns are positioned over a label that represents a continuous, quantitative variable .
  • The height of the column indicates the size of the group defined by the column label.

The histogram below shows per capita income for five age groups.

 
Per
Capita
Income
 
$40,000
$30,000
$20,000
$10,000
 
 
 
 
 
  25-34 35-44 45-54 55-64 65-74

See also:   AP Statistics Tutorial: Bar Charts and Histograms