interquartile range

Data's central span

The interquartile range is a statistical measure of spread—the difference between the 75th and 25th percentiles of a dataset.

It captures where the middle half of values fall, ignoring extremes.

Unlike range or standard deviation, the interquartile range resists distortion by outliers, making it useful for skewed data: The interquartile range for home prices was $150,000.

quartiles

Q1

Seventeenth letter

boxplot · decile · quintile · percentile rank

spread

dispersion

Scattering across space

deviation · variance · scale · central tendency · skewness · heterogeneity · scatter

visualization

boxplot

Statistical distribution chart

outliers

fence

Boundary structure between properties

contamination

robustness

resistant

Withstanding external forces

unaffected · heavy-tailed

Categories
Opposites
type of dispersion measure

interquartile rangerange

Extent of variation

full range · standard deviation · variance · mean · maximum

statistical measure type

interquartile rangemean

Average, or spiteful

median · mode · central tendency · arithmetic mean · geometric mean

Family

range, quarterly, intramural, quartile, quartiles, interquartile, inter-

Familiarity
Top 1,000,000
Profile
Used worldwide · Timeless · Abstract · Rated G