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What is a correlation in statistics?

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A correlation is a statistical measure that describes the extent to which two variables change together.

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CCSS.HSS.ID.B.5

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What does a positive correlation indicate?

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A positive correlation 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 correlation indicate?

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A negative correlation 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 does no correlation mean?

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

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CCSS.HSF-LE.A.1B

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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 strength and direction of a linear relationship between two variables.

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CCSS.HSS.ID.C.8

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What is the range of the correlation coefficient?

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The range of the correlation coefficient is from -1 to 1.

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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.

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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 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 0 indicate?

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A correlation coefficient of 0 indicates no linear relationship between the two variables.

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CCSS.HSS.ID.B.5

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How can you visually assess correlation?

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You can visually assess correlation by plotting the data on a scatter plot and observing the pattern of the points.

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CCSS.7.SP.B.3