Lesson objective: Identify possible associations in two-way tables for categorical data.

This lesson helps to build procedural skill with identifying possible associations in categorical data. A two-way table is used here because it highlights possible associations. This work develops students' understanding that examining frequencies in two-way tables and other displays of categorical data gives information about associations.

Students engage in Mathematical Practice 3 (Construct viable arguments and critique the reasoning of others) as they decide which students' statements about possible associations are accurate based on the data in two-way tables.

**Key vocabulary:**

- association
- categorical data
- relative frequency
- two-way table