a measure of variability and it is the range between the upper and lower quartiles (ie the middle 50% of a distribution) and it is equal to the difference between the 75th and the 25th percentile.
RESEARCH INTERQUARTILE RANGE
Meaning of RESEARCH INTERQUARTILE RANGE in English
Raynet Business and Marketing English glossary. Английский глоссарий компании Raynet Business and Marketing . 2012