the frequency is the number of times each score, event or measurement occurs.

frequency distribution is shown in a table in which information or data is arranged in order.

from the frequency distribution, the averages can be found, and the data can be shown on graphs such as bar graphs,histograms and frequency curves.

Key Skills

  • make a frequency table from a set of data
  • draw a bar graph, histogram or frequency curve from a frequency table
  • read information from one of the above types of graph
  • calculate the mode, mean or median from a frequency table


ungrouped data, grouped dataaveragemedianmodemean, histogram, frequency curvefrequency, frequency polygon.