So, basically it is same as Median. The interquartile range is the distance between the third and the first quartile, or, in other words, IQR equals Q3 minus Q1. IQR = Q3- Q1. How to calculate IQR. Step 1: Order from low to high. Step 2: Find the median o

Quartiles and interquartile range. The interquartile range is another measure of spread, except that it has the added advantage of not being affected by large outlying values.

A list of values with quartiles can be illustrated with what is known as a Box and Whisker Plot, sometimes referred to as just a Box Plot. They have the general form: The middle part of the diagram is called the Box, with the horizontal lines and end poin