Answer: quartiles

AnswerCrossword Clue
QUARTILESValues that divide a statistical sample into four equal parts
QUARTILESTest-result groupings
quartilesEach of the three values of the random variable that divide a population into four such groups
quartilesEach of four equal groups into which a population can be divided according to the distribution of values of a particular variable
quartilesQUARTILE, an aspect of planets