The IQR describes the middle 50% of values when ordered from lowest to highest. To find the interquartile range (IQR), ​first find the median (middle value) of the lower and upper half of the data. These values are quartile 1 (Q1) and quartile 3 (Q3). The IQR is the difference between Q3 and Q1.

What does interquartile range tell you?

The interquartile range (IQR) is the distance between the first and third quartile marks. The IQR is a measurement of the variability about the median. More specifically, the IQR tells us the range of the middle half of the data.

How do you use interquartile range in a sentence?

The whiskers give 1.5 times the interquartile range. The interim advisory committee's recommendations fall exactly within the interquartile range and were deliberately made to do so. The committee's recommendations were, exactly as asked, within the interquartile range of non-manual increases.