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 correlation in a scatterplot indicate?

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A positive correlation indicates that as one variable increases, the other variable also increases.

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CCSS.HSS.ID.B.5

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What does a negative correlation in a scatterplot indicate?

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A negative correlation indicates that as one variable increases, the other variable decreases.

Tags

CCSS.HSS.ID.B.5

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What does no correlation mean in a scatterplot?

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No correlation means there is no apparent relationship between the two variables; changes in one variable do not predict changes in the other.

Tags

CCSS.HSS.ID.B.5

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How can you identify a linear relationship in a scatterplot?

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A linear relationship can be identified if the points in the scatterplot form a straight line or a pattern that closely resembles a straight line.

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CCSS.8.F.A.3

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What is the purpose of analyzing scatterplots?

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The purpose is to identify relationships between two variables, such as correlation and trends.

Tags

CCSS.HSS.ID.B.5

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What type of correlation is shown if the points slope downwards from left to right?

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This indicates a negative correlation.

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CCSS.HSF-LE.A.1B

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What type of correlation is shown if the points slope upwards from left to right?

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This indicates a positive correlation.

Tags

CCSS.HSS.ID.B.5

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In a scatterplot, what does it mean if the points are widely scattered?

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Widely scattered points suggest a weak correlation between the variables.

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CCSS.HSF-LE.A.1B

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What is an example of a positive correlation in real life?

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An example is the relationship between study time and test scores; generally, more study time leads to higher test scores.

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CCSS.HSS.ID.B.5