interquartile range


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interquartile range

[¦in·tər′kwȯr‚tīl ‚rānj]
(statistics)
The distance between the top of the lower quartile and the bottom of the upper quartile of a distribution.
References in periodicals archive ?
Table 2 depicts the median, interquartile range and the mean rank of statements and subscales showing statistically significant differences in the perceptions of the male and female interns.
Indicator 2 (reduction in state or other government funding to higher education) had a median of 3 with an interquartile range of 3.
pylori negative patients, 519.35 (interquartile range 151 to 2544) versus 177.80 (interquartile range 49.99 to 697.60); p = 0.015] (Figure 2B).
IQR = Q3 - Q1 Normalized interquartile range (NIQR): NIQR = IQR * 0.7413
This paper makes use of interquartile ranges, obtained from the life tables by subtracting the age at which 25% of cohort members have experienced the event from the age at which 75% have undergone the experience.
Table 5 The Proportion of Resources Allocated by Evaluation Offices to Program Evaluations (in percent) Evaluation Offices (N= 28) Proportion of Budget Allocated to Program Evaluations Range 0-80 Median 39 Interquartile range 2-50 Proportion of Budget Allocated to Management Reviews Range 20-80 Median 38 Interquartile range 25-50 Proportion of Budget Allocated to Tracing Flow of Resources in Programs Range 0-50 Median 24 Interquartile Range 10-30 Great diversity existed in the programmatic focus of the program reviews performed by IG and evaluation offices.
The interquartile range (showing values at the 25th and 75th percentiles) spanned 11.2 to 16.3 percent.
No significant correlation with the risk of diabetes was seen for an increase in ambient air sodium concentration (interquartile range increase, 0.045 [micro]g/m[sup.3]) as the negative exposure control.
Among these differences, 46% of drug users and 61% of nonusers were hyperlipidemic, 70% of users and 49% of nonusers were smokers, 8% of users and 4% of nonusers presented in cardiac arrest, and the median normalized troponin level was 61 interquartile range in users versus 39 IQR in nonusers.
Interquartile range for all groups are given in the Table.
Numerical data and variables with distorted distribution were expressed by median as a measure of central value and interquartile range, while [chi square]-test contingency was used to analyze differentiation in the frequency of the parameters analyzed.