Word of the Day - quintile

quintile

/ˈkwɪntʌɪl//ˈkwɪntɪl/
noun
1 Statistics

Any of five equal groups into which a population can be divided
according to the distribution of values of a particular variable.
1.1 Each of the four values of the random variable which divide a population into quintiles.
2 Astrology
mass noun An aspect of 72° (one fifth of a circle).

Origin
Early 17th century: from Latin quintilis (mensis) ‘fifth month, July’, from quintus ‘fifth’.

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In the mathematician's bathroom, the tile above the tub was mostly white,
except for an approximate normal distribution grouping of quintiles.