Which best describes the idea behind the "invisible hand"? Producers decide what to make for consumers, which guides the economy. Individuals seeking their own self interest benefit the economy as a whole. Government sets policy for producers and consumers, which guides the economy. Consumers decide what they need and want to buy, which guides the economy.

Match the item to the definition: indirect correlation, correlational research, correlational research, covary, pearson correlation coefficient, pearson correlation coefficient, direct correlation a. used to describe the relationship between two or more naturally occurring variables b. determines whether scores on the two variables covary c. whether two variables vary or change together d. denoted by the symbol "r" e. provides information about the sign (direction) and magnitude(strength) of the linear relationship. f. when the correlation is positiveg. when the correlation is negative