👉 A quintile is a quartile that is divided into five equal parts and represents 25% of the data. It is often used in statistical analysis to describe the distribution of values within a group or category. For example, if you have a set of numbers from 10 to 30 (inclusive), then the first quintile would be 10, the second quintile would be 15, and so on. Quintiles are useful for identifying outliers in data