Both the Pearson coefficient calculation and basic linear regression are ... used to make predictions. Correlation combines several important and related statistical concepts, namely, variance ...

The Pearson coefficient is a type of correlation ... Pearson is known for the concepts of chi-squared test and p-value, among others, and development of linear regression and classification ...

Every day I come across investors who think that regression to the mean has nothing to do with correlation, who don't bother to think about odds, and who take wild stabs at position sizing.