Definitions for interquartile range

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  1. interquartile range(Noun)

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


  1. Interquartile range

    In descriptive statistics, the interquartile range, also called the midspread or middle fifty, is a measure of statistical dispersion, being equal to the difference between the upper and lower quartiles, IQR = Q3 − Q1. It is a trimmed estimator, defined as the 25% trimmed mid-range, and is the most significant basic robust measure of scale. It is the 3rd Quartile of a box plot plot minus the first quartile.

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