Modeling continuous relationships: Correlation
Slides for “Modeling continuous relationships: Correlation”
Control questions:
- If an increase in X is associated with an increase in Y, what sign will the correlation coefficient have?
- If an increase in Y is associated with an decrease in X, what sign will the correlation coefficient have?
- What type of dependence is described by correlations?
- What does zero correlation mean for the relationship between X and Y?
- What kind of distribution do we use in a hypothesis test of correlation?