"There's no difference between 2300 and 2400."

[bovertine]

<p>

The primary difficulty I see with the Brown data is that it is sectional. It does suggest strongly that a single 800 is associated with a somewhat greater chance of admissions that a single 750-790. But, we cannot determine more with certainty.

True, we don’t really know anything with certainty. And I’m sure there are all sorts of tortuous arguments that can be made, in fact I’ve made many of them myself. I haven’t got the inclination to do an exhaustive analysis of every confounding possibility. </p>

<p>But look at the Brown ACT test data. It appears a perfect composite 36 gives an applicant almost a 20% bump over a 33-35 range. Why would this be true for the composite ACT but not the SAT?</p>