Discover what quartiles are in statistics, how to calculate them, and see examples to help you interpret data more ...

The interquartile range is the difference between the lower quartile and the upper quartile. Consider the following data: 1, 3, 4, 6, 9, 14, 15, 17, 18, 22, 60 Firstly there are 11 numbers present.

Interquartile range We know that for a set of ordered numbers, the median Q 2, is the middle number which divides the data into two halves.