Scatter plots and Association

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What is correlation?

Back

Correlation is a statistical measure that describes the extent to which two variables change together. It can be positive, negative, or none.

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CCSS.HSS.ID.C.9

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What is a positive correlation?

Back

A positive correlation occurs when an increase in one variable leads to an increase in another variable.

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CCSS.HSS.ID.B.5

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What is a negative correlation?

Back

A negative correlation occurs when an increase in one variable leads to a decrease in another variable.

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CCSS.HSS.ID.B.5

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What does no correlation mean?

Back

No correlation means that there is no relationship between the changes in two variables.

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CCSS.HSS.ID.B.5

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What is a scatter plot?

Back

A scatter plot is a graph that displays values for typically two variables for a set of data.

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CCSS.8.SP.A.1

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What does a positive association in a scatter plot indicate?

Back

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 scatter plot 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.HSF-LE.A.1B

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What is a linear association?

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A linear association is a relationship between two variables that can be represented by a straight line.

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CCSS.8.F.A.3

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What is a nonlinear association?

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A nonlinear association is a relationship between two variables that cannot be represented by a straight line.

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CCSS.8.F.A.3

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How can you identify a positive correlation in a scatter plot?

Back

A positive correlation is identified when the points on the scatter plot slope upwards from left to right.

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CCSS.HSS.ID.B.5