The interquartile range (IQR) is a statistical measure of the middle values of a sample data set that is separated into four equal parts. This middle-value grouping can provide a median range ...

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

Learn about and revise how to find the mean, median and mode averages from data with GCSE Bitesize AQA Maths.

Find the interquartile range of the weights of the babies. To find the median value, or the value that is half way along the list, the method is to count the number of numbers, add one and divide ...