Scatterplots - Identify association

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What is a scatterplot?

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A scatterplot is a graph that displays values for typically two variables for a set of data. Each point represents an observation in the dataset.

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CCSS.8.SP.A.1

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What does a positive association in a scatterplot indicate?

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A positive association indicates that as one variable increases, the other variable also tends to increase.

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CCSS.HSS.ID.B.5

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What does a negative association in a scatterplot indicate?

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A negative association indicates that as one variable increases, the other variable tends to decrease.

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CCSS.HSS.ID.B.5

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What is a linear association?

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A linear association is when the data points in a scatterplot can be approximated by a straight line.

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CCSS.8.F.A.3

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What is a non-linear association?

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A non-linear association is when the data points in a scatterplot do not follow a straight line and may form curves or other shapes.

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CCSS.8.F.A.3

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How can you identify a strong association in a scatterplot?

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A strong association is indicated by data points that are closely clustered around a line or curve.

Tags

CCSS.HSS.ID.B.5

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What does it mean if there is no association in a scatterplot?

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No association means that there is no discernible pattern between the two variables; the points are scattered randomly.

Tags

CCSS.HSS.ID.B.5

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What is the correlation coefficient?

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The correlation coefficient is a numerical measure of the strength and direction of a linear relationship between two variables, ranging from -1 to 1.

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CCSS.HSS.ID.C.8

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What does a correlation coefficient of -1 indicate?

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A correlation coefficient of -1 indicates a perfect negative linear relationship between two variables.

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CCSS.HSS.ID.B.5

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What does a correlation coefficient of 1 indicate?

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A correlation coefficient of 1 indicates a perfect positive linear relationship between two variables.

Tags

CCSS.HSS.ID.B.5