Graphical representation of data Graphs in general;The bar chart; Line charts;The histogram; Exploratory data analysis; Using SPSS to produce your charts

Interval data points, grouped into categories, can be represented graphically as a histogram or as a frequency polygon. Tukey (1977) promoted techniques of exploratory data analysis with an emphasis on thorough examination of patterns before submitting data sets to tests of statistical significance. Two methods are included here: stem and leaf diagrams, and box-plots.