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Quantile
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== Other quantifications == Values that divide sorted data into equal subsets other than four have different names. *The only 2-quantile is called the [[median]] *The 3-quantiles are called [[wikt:tertile|tertile]]s or [[wikt:tercile|tercile]]s β T *The 4-quantiles are called [[quartile]]s β Q; the difference between upper and lower quartiles is also called the [[interquartile range]], '''midspread''' or '''middle fifty''' β IQR = {{math|''Q''<sub>3</sub> β ''Q''<sub>1</sub>}}. *The 5-quantiles are called [[wikt:quintile|quintile]]s or [[wikt:pentile|pentile]]s β QU *The 6-quantiles are called [[wikt:sextile|sextile]]s β S *The 7-quantiles are called [[wikt:septile|septile]]s β SP *The 8-quantiles are called [[wikt:octile|octile]]s β O *The 10-quantiles are called [[decile]]s β D *The 12-quantiles are called duo-deciles or dodeciles β DD *The 16-quantiles are called [[wikt:hexadecile|hexadecile]]s β H *The 20-quantiles are called [[wikt:ventile|ventile]]s, [[wikt:vigintile|vigintile]]s, or demi-deciles β V *The 100-quantiles are called [[percentile]]s or centiles β P *{{anchor|millile}}{{anchor|permille}} The 1000-quantiles have been called permilles or milliles, but these are rare and largely obsolete<ref name="walker">{{Cite book |last1=Walker |first1=Helen Mary |url=https://books.google.com/books?id=ogYnAQAAIAAJ&q=permille |title=Elementary Statistical Methods |last2=Lev |first2=Joseph |date=1969 |publisher=Holt, Rinehart and Winston |isbn=978-0-03-081130-2 |language=en}}</ref>
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