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Graphing Frequency Distributions

Frequency tables are usually converted to graphs since graphical information is easier for people to understand. There are three common types of distributions; the type of data determines which one to use. The three types are:

  • Bar chart
  • Histogram
  • Frequency polygon
An example of each type follows. Notice that in each case, the classes appear on the x-axis, and the frequency of that class is on the y-axis.