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Quintile may refer to: In statistics, a quantile for the case where the sample or population is divided into fifths Quintiles , a biotechnology research company based in the United States
The 5-quantiles are called quintiles or pentiles → QU; The 6-quantiles are called sextiles → S; The 7-quantiles are called septiles → SP; The 8-quantiles are called octiles → O; The 10-quantiles are called deciles → D; The 12-quantiles are called duo-deciles or dodeciles → DD; The 16-quantiles are called hexadeciles → H
In 1991 Quintiles GmbH was established in Germany and Quintiles Laboratories Ltd. was established in Atlanta, Georgia. [21] In September 1996, Quintiles purchased Innovex Ltd. of Britain for $747.5 million in stock. [22] Quintiles went public in 1997 and completed a successful secondary stock offering. [23]
Use the median to divide the ordered data set into two halves. The median becomes the second quartile. If there are an odd number of data points in the original ordered data set, do not include the median (the central value in the ordered list) in either half.
In the general case of distribution functions that are not strictly monotonic and therefore do not permit an inverse c.d.f., the quantile is a (potentially) set valued functional of a distribution function F, given by the interval [1]
The top quintile in personal income in 2022 was $117,162 [2] (included in the chart below). The differences between household and personal income are considerable, since 61% of households now have two or more income earners. [3]
The indices are typically ordered from lowest to highest, and grouped into population quintiles. In the 1981, 1991 and 2001 indices, quintile 1 represented the least [33] deprived areas, and quintile 5 represented the most deprived. In 2011, the order was reversed, in line with the ordering of the Scottish Index of Multiple Deprivation.
A moderately robust measure of central tendency - known as the decile mean - can be computed by making use of a sample's deciles to (= 10th percentile, = 20th percentile and so on).