A statistical term referring to each of four equal groups into which a population can be divided according to the distribution of values of a particular variable.

The data was divided into quartiles to better understand the distribution of income levels.

One of the three values that divide a data set into four equal parts, each containing a quarter of the data.

The first quartile of the test scores was 65, indicating that 25% of students scored below this mark.

quartileadjective

Relating to or based on quartiles.

Quartile regression is often employed to analyze income inequality.