Strand: STATISTICS AND PROBABILITY (8.SP)

Investigate patterns of association in bivariate data (Standards 8.SP.1-4).

Standard 8.SP.1

Construct and interpret scatter plots for bivariate measurement data to investigate patterns of association between two quantities. Describe patterns such as clustering, outliers, positive or negative association, linear association, and nonlinear association.

• Animal Brains
The purpose of this task is for students to create scatterplots, and think critically about associations and outliers in data as well as informally fit a trend line to data. This task provides an example of how students could informally fit a line to bivariate data without using technology to "magically" make the line appear.
• Birds' Eggs
This task asks students to glean contextual information about bird eggs from a collection of measurements of said eggs organized in a scatter plot. In particular, students are asked to identify a correlation and use it to make interpolative predictions, and reason about the properties of specific eggs via the graphical presentation of the data.
• Chapter 6 - Mathematical Foundation (UMSMP)
This is Chapter 6 of the Utah Middle School Math: Grade 8 textbook. It provides a Mathematical Foundation for Statistics: Investigate patterns of Association in Bivariate Data.
• Chapter 6 - Student Workbook (UMSMP)
This is Chapter 6 of the Utah Middle School Math: Grade 8 student workbook. It focuses on Statistics: Investigate patterns of Association in Bivariate Data.
• Create a Graph
This applet allows students to create bar, line, area, pie, and XY graphs.
• Grade 8 Math Module 6: Linear Functions (EngageNY)
In Grades 6 and 7, students worked with data involving a single variable. Module 6 introduces students to bivariate data. Students are introduced to a function as a rule that assigns exactly one value to each input. In this module, students use their understanding of functions to model the possible relationships of bivariate data. This module is important in setting a foundation for students work in algebra in Grade 9.
• Grade 8 Unit 6: Linear Models and Tables (Georgia Standards)
In this unit students will identify the rate of change and the initial value from tables, graphs, equations, or verbal descriptions; write a model for a linear function; sketch a graph when given a verbal description of a situation; analyze scatter plots; informally develop a line of best fit; use bivariate data to create graphs and linear models; and recognize patterns and interpret bivariate data.
• Hand span and height
Do taller people tend to have bigger hands? To investigate this question, each student will measure his or her hand span (in cm) and height (in inches) and record these values in a table given.
• Lesson Starter: Populated Communities
Students will use statistics and probability knowledge, as well as critical thinking skills, to solve problems.
• Linear Regression and Correlation
In this lesson students will plot data onto a scatter plot and then determine the line of best fit for the data sets.
• Scatter Plot
The applet included in this lesson allows the student to enter ordered pairs and plot them.
• Simple Plot
The applet in this lesson plan allows the student to plot ordered pairs and understand functions.
• Statistics and Probability (8.SP) - 8th Grade Core Guide
The Utah State Board of Education (USBE) and educators around the state of Utah developed these guides for Mathematics Grade 8 Statistics and Probability.
In this task students will user a scatter graph to investigate a possible connection between the length and width of bird's eggs.
In this task, students use a scatter graph to look for patterns in the size of birds' eggs.
In this task, students will use a scatter diagram to compare the results of two school tests.