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 Description  
 Bar Graph:  A way of displaying categorical data using horizontal or vertical bars so that the height or length of the bars indicates its value.


As shown in the picture above, characteristics of bar graphs include:

  • All bars have the same width (equal intervals).
  • The equal intervals are shown on one of the axes.
  • The frequency of the data in each interval is represented by the height/length of the bar.

In a bar graph, the bars can either be horizontal or vertical. Also, different groups can be indicated using different colored bars, or bars with different patterns. For example, in the bar graph below, the sports activities in which people participated are put in the categories of exercise walking, swimming, bicycle riding, etc. In this example, the bars are horizontal. Note that different groups are matched by using different colored bars.



Click here for instructions on creating a bar graph.

For the graph above the categories are the type of exercise. Two bars were drawn for each category, one for females and one for males. The bars represent the percentage of males or females that participated in the form of exercise indicated by the category. For example 22.5% of males participated in exercise walking and 37.8% of females participated in exercise walking.