# Recent content by Tomacork

1. ### attainment tests

If the scores on two attainment tests are normally distributed and correlate at 0.6 , what is the probability of a randomly selected test-taker being in the top 10% on at least one of them? I assume the answer to be about 13-14 % but how is this calculated and how would you calculate this for...
2. ### Test correlations and probability

If the scores on two attainment tests are normally distributed and correlate at 0.6 , what is the probability of a randomly selected test-taker being in the top 10% on at least one of them? I assume the answer to be about 13-14 % but how is this calculated and how would you calculate this for...