Quartile

A quartile is a special percentile. Q1 is the first quartile which is equal to the 25th percentile. Q2 is the second quartile which is equal to the 50th percentile which is equal to the median. Q3 is the third quartile which is equal to the 75th percentile. If Jose scored at the third quartile on his English essay, then we know that 75% of the grades on the English essays were less than or equal to Jose's score. Only 25% of the grades on the English essays were higher than Jose's score.