Correlation analysis

A coefficient of determination r2 is computed and indicates the proportion of change in the dependent variable that is associated with changes in the independent variable. For instance, an r2 of 0.49 means that 49% of the variation in the dependent variable is associated with changes in the independent variable. The square root of the coefficient of determination is the correlation coefficient r and is an index of association between the two variables.

A strong correlation does not establish causality. There are two major categories of correlation analysis: bivariate and multivariate. Bivariate analysis measures the relationship between two variables whereas multivariate analysis measures the relationship among three or more variables.

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