Correlation
- is the degree to which one variable moves in line with another variable
- is a type of bivariate descriptive statistic that measures the strength of the association between 2 variables
- correlation means that they move together (positive correlation indicates increasing and decreasing together, negative correlation means they move in the opposite direction). linear correlation is more specific still; then they move in proportion, not just in the same (or opposite) direction
- there is no independent and no dependent variable in a correlation
- see also: Causation vs Dependence vs Correlation vs Relationships vs Association vs Laws
Correlation - Types
- Partial Correlation
- Spearman Rank Correlation
- Polychoric Correlation
- Point-Biserial Correlation
- Rank-Biserial Correlation
- Tetrachoric
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