(4) Correlation

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7 Terms

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Bivariate data

Data which has pairs of values for two variables

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Correlation

Describes the nature of the linear relationship between two variables

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Casual relationship of variables

A change in one variable causes a change in the other (causation)

Correlation does not imply causation

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Regression line equation

y = a + bx

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Positively correlated data

b is positive

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Negatively correlated data

b is negative

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When to use regression line equation to predict dependent variable values

When the values are within the range of data (interpolation)