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percentiles
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Percentiles
The percentile (this term was first used by Galton, 1885a) of a distribution of values is a number xp such that a percentage p of the population values are less than or equal to xp. For example, the 25th percentile (also referred to as the .25 quantile or lower quartile ) of a variable is a value (xp) such that 25% (p) of the values of the variable fall below that value.
Similarly, the 75th percentile (also referred to as the .75 quantile or upper quartile ) is a value such that 75% of the values of the variable fall below that value and is calculated accordingly.
Similarly, the 75th percentile (also referred to as the .75 quantile or upper quartile ) is a value such that 75% of the values of the variable fall below that value and is calculated accordingly.
