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Common Core Learning Standards GRADE 8 Mathematics STATISTICS & PROBABILITY Common Core Learning Standards Investigate patterns of association in bivariate data. Concepts Scatter plots 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. Rigorous Sample Tasks Embedded Skills Construct a scatter plot for bivariate data. Interpret scatter plots for bivariate data. Describe patterns for clustering of data. Describe patterns for outliers of data. Describe positive/negative association of data. Describe linear/nonlinear association of data. Vocabulary Scatter plots Bivariate Outliers Positive/negative association Linear/nonlinear association Clustering Ordered pairs Trend Scaffolded Sample Tasks Copyright (c) 2011 by Erie 1 BOCES- Deep Curriculum Project for Mathematics-- Permission to use (not alter) and reproduce for educational purposes only. Common Core Learning Standards Investigate patterns of association in bivariate data. Concepts Embedded Skills Regression Describe a linear relationship from a scatter plot. 8.SP.2. Know that straight lines are widely used to model relationships between two quantitative variables. For scatter plots that suggest a linear association, informally fit a straight line, and informally assess the model fit by judging the closeness of the data points to the line. Rigorous Sample Tasks Draw/sketch a line on a scatter plot that best fits the data. Choose the line that most appropriately fits the data. Plot ordered pairs on a coordinate plane. Describe the type of correlation from the trend line. Vocabulary Scatter plot Correlation Linear relationship Independent Dependent Trend Line of best fit Quantitative data Scaffolded Sample Tasks Copyright (c) 2011 by Erie 1 BOCES- Deep Curriculum Project for Mathematics-- Permission to use (not alter) and reproduce for educational purposes only. Common Core Learning Standards Investigate patterns of association in bivariate data. Concepts Linear models 8.SP.3. Use the equation of a linear model to solve problems in the context of bivariate measurement data, interpreting the slope and intercept. For example, in a linear model for a biology experiment, interpret a slope of 1.5 cm/hr as meaning that an additional hour of sunlight each day is associated with an additional 1.5 cm in mature plant height. Rigorous Sample Tasks Embedded Skills Identify the slope and intercept from the equation of a linear model in the context of a problem. Draw logical conclusions using slope and yintercept of the line. Describe the slope and intercept from the equation of a linear model to solve a problem. Vocabulary Bivariate Slope Rate of change Equation of a line Linear equation Trend line Ordered pair Y-intercept Scaffolded Sample Tasks Copyright (c) 2011 by Erie 1 BOCES- Deep Curriculum Project for Mathematics-- Permission to use (not alter) and reproduce for educational purposes only. Common Core Learning Standards Investigate patterns of association in bivariate data. Concepts Two way tables 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? Rigorous Sample Tasks Embedded Skills Construct a two-way table on two categorical variables collected from the same subjects. Describe patterns of association displayed in a two way table. Draw conclusions about the association between the data (positive association/negative association). Calculate relative frequencies from data given in a two way table. Describe possible associations based on the relative frequencies. Vocabulary Two-way table Bivariate Frequency Relative frequency Association (correlation) Variable Scaffolded Sample Tasks Copyright (c) 2011 by Erie 1 BOCES- Deep Curriculum Project for Mathematics-- Permission to use (not alter) and reproduce for educational purposes only.