Percentile rank意思

Percentile rank is a statistical measure that indicates the percentage of scores in a distribution that are lower than a particular score. In other words, it tells you what percent of the data falls below a given value. For example, if a score is in the 80th percentile, it means that 80% of the scores in the distribution are below that score, and 20% are at or above that score.

Percentile ranks are commonly used in educational testing, where they can provide a more nuanced understanding of a student's performance than just their raw score. For instance, a student who scores in the 90th percentile has performed better than 90% of the students who took the test.

Percentile ranks are also used in various fields such as medicine, psychology, and business to evaluate performance, assess risk, and make informed decisions based on data.