what is a quintile quintile
The term quintile refers to one-fifth of a particular group. Quintile 1 typically means the top one-fifth of the group, quintile 2 refers to the second fifth and so on down to quintile 5, the lowest group. In education, a quintile rank may apply to ideas such as student grades or program effectiveness, ranking people or ideas to give a clear idea of their relationships to each other and to indicate the top performers.