Quartile

Each quartile contains 25% of the total observations. The data are ordered from smallest to largest, with those observations falling below 25% of all the data analysed allocated to the first quartile. Observations falling between 25.1% and 50% and allocated to the second quartile, then the observations falling between 51% and 75% allocated to the third quartile. Finally, the remaining observations are allocated to the fourth quartile.