In a law school class, the entering students averaged about 162 on the LSAT; the SD was about 7. The histogram of LSAT scores followed the normal curve reasonably well. (LSAT scores range from 120 to 180; among all test-takers, the average is around 150 and the SD is around 9
One student was 0.5 SDs above average on the LSAT. About what percentage of the students had lower scores than he did?