correlations are aggregate data measures that are only meaningful on large datasets. a high score on the SAT for one person does not imply that that person is

correlations are aggregate data measures that are only meaningful on large datasets. a high score on the SAT for one person does not imply that that person is smart. it just means that if you had a large population of people and you wanted to predict their intelligence, you could use SAT scores and get pretty good results.