A student scores at the 90th percentile. This means the share of scores at or below hers is:

1. A percentile counts how much of the data sits at or below a value. 2. Being at the ninetieth means nine tenths of scores are no higher. 3. So 90 percent of scores are the same or less. _Source: OpenStax Introductory Statistics 2e, Chapter 2, Descriptive Statistics._