<p>Yes, it just means that the middle 50% of students got between a 920 and a 1240, so the average isn't necessarily 1080, if for ex. there are 100 people in that 50% and theoretically 75 of those people got exactly 1240 and 25 got 920, then the average wouldn't be 1080, and the average would take into account the bottom and top 25% as well.</p>
<p>No, it's as if they lined up everyone by SAT score, took out the middle 50% and out of the 50% the highest scorer has a 1240 and the lowest a 920.</p>