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 ...

The interquartile range is another measure of spread, except that it has the added advantage of not being affected by large outlying values. In order to calculate this value we must first ...

What is the range of the data? What is the lower quartile? Calculate the interquartile range of the data. The top 25% of the pupils get an A. What mark was required for an A? Team 1 had a higher ...