quartile range

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• Quartile — In descriptive statistics, a quartile is any of the three values which divide the sorted data set into four equal parts, so that each part represents one fourth of the sampled population. Definitions * first quartile (designated Q1) = lower… …   Wikipedia

• Quartile — En statistique descriptive, un quartile est chacune des 3 valeurs qui divisent les données triées en 4 parts égales, de sorte que chaque partie représente 1/4 de l échantillon de population. Calcul des quartiles Voir à quantile pour les méthodes …   Wikipédia en Français

• Quartile coefficient of dispersion — In statistics, the quartile coefficient of dispersion is a descriptive statistic used to make comparisons within and between data sets. The statistic is easily computed using the first ( Q 1) and third ( Q 3) quartiles for each data set. Consider …   Wikipedia

• quartile — quar·tile (kworґtīl) [L. quartilis pertaining to a fourth, from quartus fourth] any of the three values that divide the range of a probability distribution into four parts of equal probability; i.e., the 1st, 2nd, and 3rd quartiles are the… …   Medical dictionary

• Interquartile range — In descriptive statistics, the interquartile range (IQR), also called the midspread, middle fifty and middle of the #s, is a measure of statistical dispersion, being equal to the difference between the third and first quartiles.Unlike the (total) …   Wikipedia

• interquartile range — “+... noun Etymology: inter + quartile : the range of values of the variable in a statistical distribution that lies between the upper and lower quartiles * * * /in teuhr kwawr tuyl, til/, Statistics. the range of values of a frequency… …   Useful english dictionary

• interquartile range — /in teuhr kwawr tuyl, til/, Statistics. the range of values of a frequency distribution between the first and third quartiles. [1880 85; INTER + QUARTILE] * * * …   Universalium

• Williams College — Motto E liberalitate E. Williams, armigeri ( Through the Generosity of E. Williams, Esquire (or Soldier) ) Established 1793 Type …   Wikipedia

• IQR — Inter Quartile Range (Academic & Science » Mathematics) * Investment Quality Ranking (Business » Stock Exchange) …   Abbreviations dictionary

• Box plot — In descriptive statistics, a boxplot (also known as a box and whisker diagram or plot) is a convenient way of graphically depicting groups of numerical data through their five number summaries (the smallest observation, lower quartile (Q1),… …   Wikipedia

• Interquartile mean — The interquartile mean (IQM) is a statistical measure of central tendency, much like the mean (in more popular terms called the average), the median, and the mode. The IQM is a truncated mean and so is very similar to the scoring method used in… …   Wikipedia