Correlation coefficient
Correlation Coefficient
The Correlation Coefficient (pronunciation: /kɔːrɪˈleɪʃən ˌkəʊɪˈfɪʃənt/) is a statistical measure that calculates the strength of the relationship between the relative movements of two variables. The values range between -1.0 and 1.0. A calculated number greater than 1.0 or less than -1.0 means that there was an error in the correlation measurement.
Etymology
The term "Correlation Coefficient" is derived from the statistical term "correlation", which refers to the statistical relationship between two variables, and "coefficient", a mathematical term for a multiplier that measures some property.
Related Terms
- Pearson Correlation Coefficient: A measure of the linear correlation between two variables X and Y.
- Spearman's Rank Correlation Coefficient: A nonparametric measure of rank correlation.
- Coefficient of Determination: The square of the correlation coefficient, indicating the proportion of the variance in the dependent variable that is predictable from the independent variable(s).
- Linear Regression: A linear approach to modeling the relationship between a dependent variable and one or more independent variables.
See Also
External links
- Medical encyclopedia article on Correlation coefficient
- Wikipedia's article - Correlation coefficient
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