Statistics Primer Summary Representation of Data Data are often represented in frequency distributions, which indicate the frequency of each value in a set of scores.
Psychologists also use graphs to represent data.
These include pie graphs, frequency histograms, frequency polygons, and line graphs. Line and bar graphs are important in representing the results of experiments, because they are used to illustrate the relationship between independent and dependent variables. The McGraw-Hill Companies. Any use is subject to the Terms of Use and Privacy Policy .