1. Adam is told that his exam score is at the 50th percentile of the distribution of exam scores. This means that

1. Adam's score is below the median exam score.
2. more than 50% of the people who took the exam had scores that were higher than Adam's score.
3. if the distribution of scores is Normal, Adam's score is higher than the mean exam score.
4. Adam's exam score is lower than 50% of the people who took this exam.
5. All of the above statements are correct.