Identifying Correlation of Scatter Plots

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What is correlation in statistics?

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Correlation is a statistical measure that describes the extent to which two variables change together. A positive correlation means that as one variable increases, the other also increases, while a negative correlation means that as one variable increases, the other decreases.

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What does a scatter plot represent?

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A scatter plot is a graphical representation of two variables, where each point represents an observation. It helps to visualize the relationship between the variables.

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What does a positive correlation look like on a scatter plot?

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In a scatter plot with a positive correlation, the points tend to rise from left to right, indicating that as one variable increases, the other variable also increases.

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What does a negative correlation look like on a scatter plot?

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In a scatter plot with a negative correlation, the points tend to fall from left to right, indicating that as one variable increases, the other variable decreases.

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CCSS.HSS.ID.B.5

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What does no correlation mean?

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No correlation means that there is no discernible relationship between the two variables. The points on the scatter plot are scattered randomly.

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How can you determine the strength of a correlation?

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The strength of a correlation can be determined by how closely the points on a scatter plot cluster around a line. A strong correlation will have points that are close to a straight line, while a weak correlation will have points that are more spread out.

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CCSS.HSS.ID.B.5

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What is a perfect positive correlation?

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A perfect positive correlation occurs when the correlation coefficient is +1, meaning that the two variables move in perfect tandem.

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CCSS.HSS.ID.B.5

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What is a perfect negative correlation?

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A perfect negative correlation occurs when the correlation coefficient is -1, meaning that one variable increases while the other decreases in perfect tandem.

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CCSS.HSS.ID.B.5

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What is the correlation coefficient?

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The correlation coefficient is a numerical value that ranges from -1 to +1, indicating the direction and strength of a linear relationship between two variables.

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What is an example of a positive correlation?

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An example of a positive correlation is the relationship between height and weight; generally, as height increases, weight tends to increase.

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