centiles
Ranking by percentage
Centiles are values that divide a statistical distribution into one hundred equal parts, each containing one percent of the observations.
Someone in the 90th centile scores higher than 90 percent of the group.
The term is synonymous with percentiles, though centile appears more often in British usage: The baby's weight is in the 75th centile.
Four-part data divisions
- decilesTenth-percentile markers
- distributionAllocation across recipients
- bell curveNormal distribution's shape
- normal distributionBell-shaped probability curve
standard deviation · mean · median · mode · variance · skewness · outliers · frequency
Data division into fourths
- decileTen-part statistical division
- quintileOne of five equal groups
- ordinalNumber denoting position
- positionLocation or stance
placement · classification · hierarchy · tier · bracket · standing · cutoff · threshold
Identical assessments across populations
- scoringEarning points in competition
- gradingAssigning marks to work
- evaluationDetermining worth or quality
- normsExpected behavioral standards
achievement levels · diagnostic · screening · growth charts · developmental milestones · aptitude · proficiency · student performance
quartiles
Four-part data divisions
- decilesTenth-percentile markers
- distributionAllocation across recipients
- bell curveNormal distribution's shape
normal distribution · standard deviation · mean · median · mode · variance · skewness · outliers · frequency · histogram
quartile
Data division into fourths
position · placement · classification · hierarchy · tier · bracket · standing · cutoff · threshold · benchmark
standardized testing
Identical assessments across populations
- scoringEarning points in competition
- gradingAssigning marks to work
- evaluationDetermining worth or quality
norms · achievement levels · diagnostic · screening · growth charts · developmental milestones · aptitude · proficiency · student performance · test scores
centilesquartiles
Four-part data divisions
deciles · quintiles · median · halves · raw scores