Sahithyan's S2 — Methods of Mathematics
Joint Distribution
Parameters
Covariance
Measure of the direction of linear relationship between 2 variables. Depends on the scale and unit of the variables.
Discrete version:
Continuous version:
| Sign of covariance | Description |
|---|---|
| Positive | Variables increase together |
| Negative | One increases as other decreases |
| Zero | No linear relationship |
Correlation
Measure of strength and direction of linear relationship between 2 variables. Always in the range