quartile

quartile Definition

quar·tile (kwôr′tīl, kwôrt′'l)

noun

any of the values in a series dividing the distribution of the individuals in the series into four groups of equal frequency
any of these groups

Etymology: ML quartilis < L quartus, fourth: see quart

quartile Usage Examples

Preposition: of

distribution: What are the lower and upper quartiles of both distributions?
authority: This also puts it in the top quartile of all local authorities.
performance: Doctors were effective and consistent in assessing their peers, they were highly consistent when assessing the 4th quartile of performance.
index: In Northern Ireland, wards are defined as disadvantaged if they are in the upper quartile of the child poverty index.
domain: Eleven of the NWDEP wards rank within the top quartile of this domain.

Converse of object

Adjective modifier

upper: They tend to be in the upper quartile of their business sector.
bottom: I'm also afraid that under John Major, the bottom quartile did not become worse off.
top: Cheltenham is also in the top quartile for the accuracy of its benefits work.
low: Owing to welfare lowest quartile of second half of.
fourth: Only the students with the most severe functional difficulties, the fourth quartile, shows less dropout then the rest.
third: Find Q 3 ( the third quartile ) for women's wage rates in April 1978.

Modifies a noun

breakpoint: Therefore the bottom quartile breakpoint is 2. Example 2 The following result set has 10 values ( therefore N = 10 ).
performance: We aim to perform at, or in excess of, the upper quartile performance levels in all service delivery areas.
price: However, it uses lower quartile house price figures rather than the mean prices used in the ratios analysis.
value: Band 1 contains those values from the top quartile value to the most extreme value in the range.
range: In conclusion, the intervention had a positive effect on playtime physical activity, with similar increases observed and maintained across the quartile range.
level: We aim to perform at, or in excess of, the upper quartile performance levels in all service delivery areas.

Noun used with modifier

income: Women from the lowest income quartile reported an average of 67 days of reproductive ill-health and annual health costs amounted to rupees 31.
crime: In 2002/03, the gap between the high crime quartile and the remaining three quartiles was 27.1 offenses per 1,000 population.

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