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Prismattic comments on 2013 Survey Results - Less Wrong
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Actually, I just ran the numbers on the SAT2400 and they're closer; the average percentile predicted from that is 99th, which corresponds to about 135.
For non-Americans, what's the difference between SAT 2400 and SAT 1600 ?
Averaging sat scores is a little iffy because, given a cut-off, they won't have Gaussian distribution. Also, given imperfect correlation it is unclear how one should convert the scores. If I pick someone with SAT in top 1% I shouldn't expect IQ in the top 1% because of regression towards the mean. (Granted I can expect both scores to be closer if I were picking by some third factor influencing both).
It'd be interesting to compare frequency of advanced degrees with the scores, for people old enough to have advanced degrees.
The SAT used to have only two sections, with a maximum of 800 points each, for a total of 1600 (the worst possible score, IIRC, was 200 on each for 400). At some point after I graduated high school, they added a 3rd 800 point section (I think it might be an essay), so the maximum score went from 1600 to 2400.
Yes, it's a timed essay.