Any of five equal groups into which a population can be divided according to the distribution of values of a particular variable.
- ‘In 1980, a majority of voters in three out of five income quintiles reported choosing the Democratic candidate, and the fourth quintile was nearly tied.’
- ‘All statistical models were consistent with this finding except for one, which categorized patients by quintile and showed no mortality difference in the first quintile.’
- ‘For example, leftists point to studies showing that the gap between the bottom quintile and the top two quintiles is increasing.’
- ‘The low level of wealth in at least the bottom two quintiles of the income distribution suggests that substantial numbers of people are likely to face such constraints.’
- ‘The study grouped doctors into five quintiles by number of procedures a year: 1 to 33, 34 to 89, 90 to 139, 140 to 206 and 207 to 582.’
- 1.1 Each of the four values of the random variable which divide a population into quintiles.
- ‘As the NSW hospitals data had also been geo-coded, we could impute an EFI quintile for each patient, based on the actual distribution of SES at the Collection District-sex-age level.’
- ‘They analyzed baseline serum vitamin A concentration in relation to risk for hip fractures as a continuous variable and by quintiles.’
- ‘Socioeconomic status was measured by the equivalent family income quintile of the patient.’
- ‘The terms tercile, quartile, quintile and decile should refer to the percentiles which divide the distribution into 3, 4, 5, or 10 equal parts, respectively.’
[mass noun] An aspect of 72° (one fifth of a circle).
- ‘The quintile refers to knowing and the empowerment which comes from knowing.’
- ‘That quintile between Pluto and Uranus met and re-met altogether five times (due to the retrograde motions), and Plutonium was created at the last of these five quintiles.’
- ‘As it has then gone three fifths around the zodiac or 216°, that is three quintile divisions, in the other direction, it is again pointing towards Earth, and this is within less than one degree!’
Early 17th century: from Latin quintilis (mensis) fifth month, July, from quintus fifth.
We take a look at several popular, though confusing, punctuation marks.