<p>Anhydrosis, Michigan is an SAT school too. Roughly 60% of Michigan students take the SAT and 70% take the ACT. </p>
<p>Also, 2 points on the ACT is roughly 70 points on the SAT. And yet, most schools with mean ACT scores two points higher than Michigan’s have SAT scores 100-130 points higher than Michigan’s. </p>
<p>I think the reason for the discrepancy between the mean ACT and SAT scores at Michigan (and other publics) vs the ACT and SAT scores at private elites is that the ACT meansures actual knowledge whereas the SAT measures familiarity with the test. The average improvement in ACTs as a result of preparation and repetition is not quite as high as the average improvement on the SAT as a result of preparation and repetition.</p>