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Message: [QUOTE="XLCenterFan, post: 3557996, member: 8712"] Not all of them. But it’s more likely as household income increases. I would be willing to bet that there is a statistically significant correlation between household income and performance on standardized tests. I would also be willing to bet that if you set up a regression model with “performance on standardized tests” as the dependant variable, and controlled for household income, educational attainment of parents, and zip code, that you would account for a majority of the variance in scores on standardized tests. [/QUOTE]