MA19.8A.37

Mathematics (2019) Grade(s): 8 - Grade 8 Accelerated

MA19.8A.37
Construct and interpret a two-way table summarizing data on two categorical variables collected from the same subjects, using relative frequencies calculated for rows or columns to describe possible associations between the two variables. [Grade 8, 21]

Unpacked Content

Knowledge

Students know:

Characteristics of data sets that distinguish categorical data from measurement data.

Skills

Students are able to:

Construct two-way tables for categorical data.
Find relative frequencies for cells in the two-way tables.
Conjecture about patterns of association in the two-way tables and explain the reasoning that leads to the conjecture.

Understanding

Students understand that:

Organizing categorical data in two-way tables can aid in identifying patterns of association in the data.
Relative frequencies, rather than just absolute frequencies, need to be calculated from two-way tables to identify patterns of association.

Vocabulary

Two-way table
Rows
Columns
Bivariate categorical data
Frequencies
Relative frequencies
Categorical variables

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