Friday, October 16, 2015

Correlation, Regression and Causation ?

What is a Correlation in statistics?

Correlation is a statistical technique that can show whether and how strongly pairs of variables are related. For example, height and weight are related; taller people tend to be heavier than shorter people. The relationship isn't perfect.

What is a Regression in statistics?

In statistics, linear regression is an approach for modeling the relationship between a scalar dependent variable y and one or more explanatory variables (or independent variables) denoted X. The case of one explanatory variable is called simple linear regression.

What is a Causation in statistics?
When an article says that causation was found, this means that the researchers found that changes in one variable they measured directly caused changes in the other.