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 ...

Correlation coefficients range from -1 to +1, indicating the strength of relationships between variables. Investors use correlation coefficients for portfolio diversification to reduce risk.

Shark attacks and ice cream sales follow the very same trajectory when charted. When ice cream sales go up, so do shark attacks. When ice cream sales decrease, shark attacks decrease. With a ...

Labor market conditions are similar in regions that are near each other. This is called positive spatial correlation.

Though true and important, the warning has hardened into the familiarity of a cliché. Stock examples of so-called spurious correlations are now a dime a dozen. As one example goes, a Pacific island ...