quartile

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quartile

 [kwor´tīl]
any of the three values that divide the range of a probability distribution into four parts of equal probability; the first, second, and third quartiles are the 25th, 50th, and 75th percentiles.

quartile

[kwôr′təl, kwôr′tīl]
Etymology: L, quartus, fourth
one-fourth of the distribution of scores. The first quartile would be the lowest 25% of scores, the second quartile would represent the 26% to 50% range of scores, and so on.

quartile

feature of descriptive statistics; area of a graph representing upper/lower 25% of particular population/cohort

quartile

one of the values establishing the division of a series of variables into fourths, or the range of items included in such a segment.
References in periodicals archive ?
Then, we compare the average underwriter reputation of the upper quintile versus that of the lower quintile, the upper quartile versus the lower quartile, and the first half of low-priced SEOs against the second half with high-priced offerings.
The large standard errors for the means of nitrate-N and EC, ranges for max-rain and upper and lower quartiles, and the high CV for the solutes indicated that within-season temporal variations were significant.
With respect to CHD, we observed a "threshold"; ~13% more men in the lower quartile of plasma TAOS had CHD compared with the combined upper quartiles.
First, the mean proportions of InAs, MMA, and DMA in subjects in the upper and lower quartile of each nutrient variable were compared using the Student t-test.
How do the high/low/most likely estimate, the upper/ lower quartile, and the median change, given changes in periodic cash flows, terminal value, and/or discount rate?
Move your fees from the lower quartile to the upper quartile of competitive fees.
Usually the shift occurs from among organizations that are in the lower quartile of groups.
Annual financial results are provided for each product type according to lower decile, lower quartile, median, upper quartile, and upper decile.
The lower quartile mean N concentration for evergreens was significantly lower than that of deciduous trees (0.
However, those of the sample companies showing a contraction appear to be performing at lower levels than the lower quartile of UK company performance.
These types are defined in terms of four possible combinations of upper and lower quartile scores as determined from the college population normative scores on the needs for nurturance and succourance[3].
The section on ratios includes 14 ratios that are broken-down into median, upper quartile, and lower quartile.

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