1. A measure of statistical dispersion, being equal to the difference between the upper and lower quartiles
   "From the set of data above we have an interquartile range of 3.5, a range of 9 - 2 = 7 and a standard deviation of 2.34";
   - midspread, middle fifty
    
2. The difference between the upper and lower quartiles in a set of data
   "The interquartile range helps identify outliers in statistical analysis"

Derived forms: interquartile ranges

Type of: statistic

Encyclopedia: Interquartile range