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1. Any of the groups that result when a frequency distribution is divided into ten groups of equal size.
2. Any of the values that separate each of these groups.
a. one of nine actual or notional values of a variable dividing its distribution into ten groups with equal frequencies: the ninth decile is the value below which 90% of the population lie. See also percentile
b. a tenth part of a distribution
[C17: from deca- + -ile]
dec•ile(ˈdɛs ɪl, -aɪl)
one of the values of a statistical variable that divides the distribution of the variable into ten groups having equal frequencies.
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|Noun||1.||decile - (statistics) any of nine points that divided a distribution of ranked scores into equal intervals where each interval contains one-tenth of the scores|
mark, score, grade - a number or letter indicating quality (especially of a student's performance); "she made good marks in algebra"; "grade A milk"; "what was your score on your homework?"
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