Stop falling for misleading headlines. Understand the difference between correlation and causation, and learn how researchers prove real scientific facts.

One of the most interesting things to talk about in math classes is the difference between correlation and causation. For example, there is a correlation between the number of movies Elijah Wood ...

Correlation coefficients are indicators of the strength of the linear relationship between two different variables, x and y. A linear correlation coefficient that is greater than zero indicates a ...

In the first case, there is a strong upward-sloping relationship between X and Y; in the second case, no apparent relationship; in the third case, a strong downward-sloping relationship. Note the ...