Scattter Plots & Correlation

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What is a scatter plot?

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A scatter plot 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 correlation mean in statistics?

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Correlation refers to a statistical relationship between two variables, indicating how one variable may change in relation to another.

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CCSS.HSS.ID.C.9

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What is a positive correlation?

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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?

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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 it mean if there is no correlation?

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No correlation means that there is no predictable relationship between the two variables; changes in one do not affect the other.

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CCSS.HSS.ID.B.5

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

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In a scatter plot, a positive correlation is identified when the points trend upwards from left to right.

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CCSS.HSS.ID.B.5

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

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In a scatter plot, a negative correlation is identified when the points trend downwards from left to right.

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What is the purpose of using scatter plots?

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Scatter plots are used to visualize the relationship between two quantitative variables and to identify patterns or trends.

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CCSS.8.SP.A.1

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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 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 positive correlation between two variables.

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CCSS.HSS.ID.B.5