Definitions for "Quintiles"
Data organised in discrete 20 percent groupings: 0–20, 21–40, 41–60, 61–80, 81–100.
Quintiles are income values which divide the population, when ranked by income, into five equal sized groups. The lowest quintile is the same as the 20th percentile. Quintile is also, sometimes, used as a shorthand term for quintile group; for example ‘the bottom quintile’ to describe the bottom 20 per cent of the income distribution.
Grouping of survey results into equally sized groups, arranged by order of magnitude of activity. Each quintile represents one-fifth of the total population (quartiles by quarters, etc.).