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 ?
Over the five-year period, 28% of large-cap funds, 24% of mid-cap funds and 30% of small-cap funds in the bottom quartile disappeared.
Metformin reduced the rate of developing diabetes only among patients in the highest risk quartile, whose mean 3-year diabetes risk averaged 60% (placebo rate=59.
By helping customers leverage the best practices and strategies of Top Quartile performers, Emerson is able to help customers improve their earnings as much as 15 percent, said Train.
In the Prospective Investigation of the Vasculature in Uppsala Seniors (PIVUS) cohort of 70-year-old men and women, hs-cTnI concentrations were independently predictive of death in those who had cTnI concentrations in the upper quartile (3).
Among those who had their experience with care measured in both round 2 and round 4 (N = 26,260), 55 percent were in a different quartile in round 4, demonstrating the time-varying nature of a patient's experiences with care.
The relationship does not hold for the Bahamas, Barbados, Bermuda and Luxembourg, which are in the first quartile for their IFDI stock-to-GDP ratios, but in the fourth quartile for their FDI Contribution Indexes.
In addition, women in the highest quartile of starch consumption were 80% more likely than those in the lowest quartile to show signs of gallbladder disease.
In the golf clubs sample, bidders in Quartile 1 have a feedback rating of 1-2, bidders in Quartile 2 have a rating of 3-5, bidders in Quartile 3 have a rating of 6-22, and bidders in Quartile 4 have a rating of more than 22.
The research shows that, when the price of gasoline increased by $1, the least fuel-efficient quartile of the market for used automobiles suffered a 5-percent decrease in market share.
The top quartile comprises Connecticut, Hawaii, Iowa, Maine, Massachusetts, Minnesota, Nebraska, New Hampshire, North Dakota, Rhode Island, South Dakota, Vermont, and Wisconsin.
5 times greater monetary benefits from avoided patient adverse events than the increased nursing cost from the lowest to the highest quartile of the distribution.