You’d need a model of how much luck depends on those factors. Test-retest variability gives a good measure of how much one person’s scores vary from test to test; apparently for the SAT the test-retest standard deviation is about 30 points. (We can’t quite apply this number, since it might not be independent of score, but it’s better than nothing.)
You’d need a model of how much luck depends on those factors. Test-retest variability gives a good measure of how much one person’s scores vary from test to test; apparently for the SAT the test-retest standard deviation is about 30 points. (We can’t quite apply this number, since it might not be independent of score, but it’s better than nothing.)