quartile

Noun
  1. (statistics) any of three points that divide an ordered distribution into four parts each containing one quarter of the scores (synset 105746149)
    referred to in: statistics - a branch of applied mathematics concerned with the collection and interpretation of quantitative data and the use of probability theory to estimate population parameters
    is a type of: grade, mark, score - a number or letter indicating quality (especially of a student's performance)

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