interquartile range

interquartile range
The difference between the first and third quartiles; a robust measure of sample dispersion.

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  • 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 —   statistical measure of the spread of values around the median. When the upper, or higher, 25% of values and the lower 25% of values are removed, the spread of the remaining, interquartile, values is derived …   Geography glossary

  • 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

  • interquartile range — the difference between the data values at the 75th and 25th percentiles, encompassing the middle 50 per cent of the data …   Medical dictionary

  • 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

  • Range (statistics) — In descriptive statistics, the range is the length of the smallest interval which contains all the data. It is calculated by subtracting the smallest observations from the greatest and provides an indication of statistical dispersion. It is… …   Wikipedia

  • Écart interquartile — En statistiques, l’écart interquartile[1] ou étendue interquartile[2] (EI) est une mesure de dispersion qui s obtient en faisant la différence entre le premier et le troisième quartiles : EI = Q3 Q1. L EI est un estimateur statistique… …   Wikipédia en Français

  • IQR — interquartile range …   Medical dictionary

  • IQR — • interquartile range …   Dictionary of medical acronyms & abbreviations

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