# Summary Measures for Categorical Data

For categorical data, the most typical summary
measure is the number or percentage of cases in each category. The **mode** is the category with the greatest
number of cases. For ordinal data, the **median** (the value at which half of the cases fall above
and below) may also be a useful summary measure if there is a large
number of categories.

The Frequencies procedure produces frequency tables that display both the number and percentage of cases for each observed value of a variable.

- From the
menus choose:
Note: This feature requires the Statistics Base option.

- Select
*Owns PDA [ownpda]*and*Owns TV [owntv]*and move them into the Variable(s) list. - Click OK to run the procedure.

The frequency tables are displayed in the Viewer window. The frequency tables reveal that only 20.4% of the people own PDAs, but almost everybody owns a TV (99.0%). These might not be interesting revelations, although it might be interesting to find out more about the small group of people who do not own televisions.