8th grade Math Guide

Statistics and Probability

Core Guide

Grade 8

Investigate patterns of association in bivariate data (8.SP.1-4) Standard 8.SP.4: Understand that patterns of association can also be seen in bivariate categorical data by displaying frequencies and relative frequencies in a two-way table. Construct and interpret a two-way table summarizing data on two categorical variables collected from the same subjects. Use relative frequencies calculated for rows or columns to describe possible association between the two variables. For example, collect data from students in your class on whether or not they have a curfew on school nights and whether or not they have assigned chores at home. Is there evidence that those who have a curfew also tend to have chores? Concepts and Skills to Master • Construct a two-way frequency table of categorical data. • Distinguish between frequencies and relative frequencies. • Calculate relative frequencies for rows and columns in two-way tables. • Interpret relative frequencies for possible associations from a two-way table. Related Standards: Current Course Related Standards: Future Courses 8.EE.6, 8.F.4, 8.SP.1, 8.SP.2, 8.SP.3 II.S.ID.5, II.S.CP.1, II.S.CP.4, II.S.CP.5, II.S.CP.6, III.S.IC.6

Support for Teachers

Critical Background Knowledge • Calculate percent’s ( 6.RP.3) •

Understand probability of a chance event (7.SP.5) • Develop a probability model (7.SP.7) and use organized lists, tables, tree diagrams, and simulation (7.SP.8) Academic Vocabulary

Resources Curriculum Resources: http://www.uen.org/core/core.do?courseNum=5180#71455 Frequency, relative frequency, categorical data, two-way table, associations

8.SP.4

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