Chapter 9 Scatter Plots and Data Analysis LESSON 1 SCATTER PLOTS AND ASSOCIATION.

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Presentation transcript:

Chapter 9 Scatter Plots and Data Analysis LESSON 1 SCATTER PLOTS AND ASSOCIATION

Scatter Plots and Association  I can construct a scatterplot.  I can describe the association, if any, among the observed data.  I can construct and interpret a scatterplot.  8.11(A)

Vocabulary Bivariate data Scatter plot Positive association Negative association No association Linear association Non-linear association

Scatter Plots and Association Data with two variables, or pairs of numerical observations, are called bivariate data. A scatter plot shows the relationship between bivariate data graphed as ordered pairs on a coordinate plane.

Scatter Plots and Association

Two sets of data have a linear association when the data points lie close to a line. When data points do not lie close to a line, the data have a non-linear association.

Scatter Plots and Association

Clusters or outliers can also be identified.

Scatter Plots and Association Variable Association – what is the relationship between the variables? Linear Association – is it linear or nonlinear? Are there clusters or outliers?

Scatter Plots and Association