We use ”contingency tables” to link two or more categorical variables together.
For instance, in the Accu-Phi case study you may wish to associate license and size.
This analysis would tell you the number and percentage of premium versus freeware
users in different size bands of customer.
Figure 15.2 Crosstab example of relating two categorical variables shows an example of this analysis, which is widely called “crosstabs.”
In contingency tables, each unique combination of categories is called a “cell.” For instance, the combination ...