quintiles
Population divided fivefold
Quintiles are the values that divide a distribution into five equal parts, each containing 20 percent of the data.
Statistical analysis often groups populations by income quintiles: Households in the lowest quintile earn under $25,000 annually.
The term appears frequently in economics, education research, and public health studies comparing outcomes across socioeconomic groups.
Hundredth-fraction rank markers
- distributionAllocation across recipients
- decilesTenth-percentile markers
- quartilesFour-part data divisions
- medianCentral sorted value
income brackets · ranking · percentile rank · frequency distribution · wealth distribution · quantiles · income inequality · stratification
How earnings are shared
- household incomeTotal money a home receives
- tax bracketsIncome-based percentage groupings
- poverty lineIncome cutoff marking need
- affluenceAbundance of money
socioeconomic status · consumer spending · market segmentation · asset allocation · retirement savings · net worth · economic mobility · wage gap
Health status post-treatment
- health metricsMeasurable wellness indicators
- clinical trialsControlled health research experiments
- mortality ratesDeaths per population measured
- epidemiologyStudy of disease spread
Numerical exam results
- academic performanceStudent's measured educational success
- grade distributionHow scores are allocated
- standardized testingIdentical assessments across populations
- school rankingsOrdered list of institutions
literacy rates · graduation rates · educational attainment · learning outcomes · proficiency levels · class rank · college readiness
percentiles
Hundredth-fraction rank markers
- distributionAllocation across recipients
- decilesTenth-percentile markers
- quartilesFour-part data divisions
median · income brackets · ranking · percentile rank · frequency distribution · wealth distribution · quantiles · income inequality · stratification · census data
income distribution
How earnings are shared
- household incomeTotal money a home receives
- tax bracketsIncome-based percentage groupings
- poverty lineIncome cutoff marking need
affluence · socioeconomic status · consumer spending · market segmentation · asset allocation · retirement savings · net worth · economic mobility · wage gap · disposable income
patient outcomes
Health status post-treatment
- health metricsMeasurable wellness indicators
- clinical trialsControlled health research experiments
- mortality ratesDeaths per population measured
epidemiology · cholesterol levels · survival rates · health disparities
test scores
Numerical exam results
- academic performanceStudent's measured educational success
- grade distributionHow scores are allocated
- standardized testingIdentical assessments across populations
school rankings · literacy rates · graduation rates · educational attainment · learning outcomes · proficiency levels · class rank · college readiness