Negative correlation is a relationship between two variables in which one variable increases as the other decreases, and vice versa.

Investopedia / Sydney Saporito What Correlation Can Tell You Correlation shows the strength of a relationship between two variables and is expressed numerically by the correlation coefficient.

In the decades to come, the phrase correlation does not imply causation made its way into textbooks and academic journals, while the social sciences were made over with newfangled statistics.

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