Interquartile Range (IQR)
Interquartile range (IQR) is the middle half of a collection of numbers that are ordered from lowest to highest.
To find the interquartile range of a collection:
- Find the median of the collection
- Find the median of lower and upper half of the collection, leaving out the median number(s)
- Subtract the lower half's median from the upper half's median. The difference is the
Resources
Broader Topics Related to Interquartile Range (IQR)
Averages: Measures of Central Tendency
Usage and calculations for mean, median, and mode on a set of numbers
Dispersions: Measures of Spread
Usage and calculations for range, standard deviation, and variance on a set of numbers