This module is for Algebra 1, Grades 7-12 Welcome

Collecting and analyzing data to determine what people want is standard procedure for many organizations, such as marketing companies, election committees, business managers, etc. Knowing what people want can help guide profits, sales and votes by increasing the chances of favorable, lucrative outcomes.

In this module, you will learn how to summarize and interpret data arranged in two-way frequency tables. A two-way frequency table is a table that examines the relationship between two categorical variables.

Module Objective

By the end of this module, you will be able to:

  • Summarize categorical data for two categories in two-way frequency tables.
  • Interpret relative frequencies in the context of the data (including joint frequencies, marginal frequencies, and conditional relative frequencies).
  • Recognize possible associations and trends in the data.
an array of survey data tables and charts


  • Calculate various ratios and frequencies within two-way tables.
  • Use relative frequencies to draw conclusions in the context of a given situation.