<p>That website appears to derive the “average” by taking the average of the 25th and 75th percentiles. Assuming that the score distributions are bell shaped, that would give the median, not the average. And if the score distributions are not bell shaped, that would give a number that is only a rough approximation to the median. The average should be lower than the median, because the tail to the left of the 25th percentile doubtless will be longer than the tail to the right of the 75th percentile.</p>
<p>2230 probably is a good approximation of the median SAT score, I would think.</p>