Definition of "quartiles" []

• Plural form of quartile. (noun)

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• "At a casual examination, or for demonstrative purposes, the extremes may be prominent, but for all further considerations the quartiles are the real values upon which to rest calculations."
• "They not only found an effect too tiny to support causal inferences but they found it only by comparing extreme quartiles, which is the statistics of desperation."
• "We also called in an economist from Stanford, Henry Levin, who had compiled data on academic achievement by socioeconomic quartiles."