2.2.9 - Percentiles

There are slightly different definitions of percentiles and different statistical software and textbooks may use different formulas. In this course, we will be using the definition from your textbook: 

Percentile
Proportion of a distribution less than a given value.

Example: Test Scores Section

Test scores are often reported in terms of percentiles. For example, if a student scores in the 90th percentile on a test then he or she scored better than 90% of students who took the test.