# interquartile range

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## interquartile range

(ˌɪntəˈkwɔːtaɪl)
n
(Statistics) statistics the difference between the value of a variable below which lie 25 per cent of the population, and that below which lie 75 per cent: a measure of the spread of the distribution
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
References in periodicals archive ?
Interquartile range increases in pollutant concentrations were consistently associated with statistically significant increases in fibrinogen, von Willebrand factor, heart rate, sCD62P, and SCD40L concentrations," they said.
The descriptive statistics were reported as the median and interquartile range. The comparative statistics used the non-parametric analysis of Mann-Whitney test to assess any significant gender differences.
The level of consensus of each of the 41 indicators was expressed as the interquartile range. Supplementing the interquartile range was the standard deviation which, taken together, provided support for determining the level of consensus.
pylori in PUD was significantly higher than GC [PUD versus GC, 3887 (interquartile range 428 to 26327) versus 2100 (interquartile range 225 to 3428.95); p = 0.028)].
Another common measure of the dispersion of a distribution is the interquartile range. The differences between quantiles of y can be computed directly from the empirical cdf:
The median time of interruption stated by the study participants was 15 days, with a maximum of three years (interquartile range: 6-30 days).
Data are presented either as mean +/- standard deviation or as median with interquartile range. Wilcoxon Rank Sum was performed to determine if there was a statistically significant difference in the dose of RAI given or in the pretreatment RAI uptake between those patients who became hypothyroid and those who did not become hypothyroid.
School-based physical education resulted in a median net increase in physical activity time of 50.3% (range 6.0%-125.3%); accountability partners or support groups produced a mean net increase of 44.2% (interquartile range 19.9%-45.6%).
Compared to the non-smokers vehicles-which had undetectable nicotine levels-the researchers found that the smokers vehicles contained concentrations ranging from 5.3 to 25.5 micrograms per cubic meter (median interquartile range, 9.6 micrograms per cubic meter).
(for example, profit levels or stock betas of two or more companies)." Clause (D)(2) provides that if there is only one variable input parameter, the arm's-length range of PCT Payments is the interquartile range calculated iteratively by varying the value of the variable input parameter each time.
The peripheral total leukocyte counts were higher in infants with U.urealyticum colonization (Quantil Q25: 12000; Quantil Q75: 20000; Interquartile range: 8000) than in non colonized infants (Quantil Q25: 9600; Quantil Q75: 16500; Interquartile range: 6900) (P<0.05).
The interquartile range (IQR) was used as the statistic for variability of rating and ranking responses, and an IQR of 1 was determined by the researchers to indicate consensus on an item.
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