The median is the point on the score scale at which 50 percent of the students' scores are above the point and 50 percent are below. The rank is the percentage of students whose scores fall below a particular scaled score. Percentile ranks should not be compared across SAT Program tests, including different SAT II tests, because the tests are taken by different groups of students. A raw score is the number of questions answered correctly minus a fraction of the incorrect answers. The raw scores are converted to scaled scores for reporting.
Nothing is subtracted for answering student produced response questions incorrectly.
Subject Tests have been linked to the new SAT I scale. See SAT II-Table 12 for current SAT II means and standard deviations. Reliability Reliability is the extent to which a test measures consistently. For scaled scores, a reliability coefficient of 1.00 indicates a test that is perfectly reliable. The SAT Program tests are highly consistent with reliability coefficients that are approximately .90.