The interquartile range (IQR) is a statistical measure of the middle values of a sample data set that is separated into four equal parts. This middle-value grouping can provide a median range ...

The interquartile range shows the range in values of the central 50% of the data. To find the interquartile range, subtract the value of the lower quartile Q1 from the value of the upper quartile ...

Learn how to calculate the interquartile range from a variety of different data types and draw and interpret box-and-whisker diagrams.