Percentile

A value on a scale that indicates the percent of a distribution that is equal to it or below it.

A score belongs to the 78th percentile, for example, if it is greater than 78% of the scores but it is not greater than 79% of the scores.

This procedure divides the scores into 100 percentiles, numbered 0th through 99th.

Decile

A group of 10 consecutive percentiles is called a decile.

Quartile

25 consecutive percentiles are called a quartile.


See also: Deciles.

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Subjects: Mathematics