1. Two-way frequency table
entries in the body of a two-way frequency table
2. Categorical variable
variables that take on values that are names or labels. The color of a ball, gender, or year in school (freshman, sophomore, junior, senior) are examples of categorical variables
3. Marginal frequencies
entries in the TOTAL row and TOTAL column of a two-way frequency table
4. Joint frequencies
a useful tool for examining relationships between categorical variables