11. Construct two-way tables for categorical data (C)

teaches Common Core State Standards CCSS.Math.Content.8.SP.A.4 http://corestandards.org/Math/Content/8/SP/A/4
teaches Common Core State Standards CCSS.Math.Practice.MP5 http://corestandards.org/Math/Practice/MP5

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Lesson objective: Understand that bivariate categorical data can be displayed in a two-way table.

Students bring prior knowledge of organizing data into categories from 1.MD.C.4. This prior knowledge is extended to bivariate categorical data as students create two-way tables. A conceptual challenge students may encounter is how to separate the categories and consolidate them into one table.

The concept is developed through work with two-way table, which helps students to organize bivariate categorical data into appropriate categories.

This work helps students deepen their understanding of operations because two-way tables can be thought of as representations of data values in categories and their sums.

Students engage in Mathematical Practice 5 (Use appropriate tools strategically) as they create a two-way table to help organize a teacher's data about what type of food should be used for a class fundraiser.

Key vocabulary:

• bivariate
• categorical data
• frequency
• two-way table

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