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Correlation Causation

Even if you find the strongest of correlations, you should never interpret it as more than just that... a correlation.


Causation indicates a relationship between two events where one event is affected by the other. In statistics, when the value of one variable, increases or decreases as a result of other events, it is said there is causation.


Let's say you have a job and get paid a certain rate per hour. The more hours you work, the more income you will earn, right? This means there is a relationship between the two events and also that a change in one event (hours worked) causes a change in the other (income). This is causation in action! https://study.com/academy/lesson/causation-in-statistics-definition-examples.html


Given any two correlated events A and B, the following relationships are possible:

  • A causes B
  • B causes A
  • A and B are both the product of a common underlying cause, but do not cause each other
  • Any relationship between A and B is simply the result of coincidence (pure chance)



Some examples: Causality or coincidence?

File:Correlation examples-Causality vs coincidence.pdf