An interquartile range calculator or formula helps to highlight a normal distribution and find the median, where greatest density of values lie in the central dataset spread. (Here's a refresher ...

In a box plot, it is easy to see the range of where 50% of your data lies. Let’s examine this a little further by describing the interquartile range. Quartiles can be defined as dividing your data ...

To find these from the graph we draw two lines ... You are allowed to be out by a little but be as accurate as you can. So the interquartile range is the difference between the upper quartile ...