Interquartile range

The **interquartile range (IQR)** measures the spread of the middle 50% of a data set, giving us a sense of how varied the central values are while ignoring extreme outliers. It’s especially useful in real-world scenarios like analyzing exam scores, house prices, or salaries, where you want to focus on the typical range rather than being misled by unusually high or low values. Jump to the questions

Practise now

Find the interquartile range (IQR) for each dataset below.

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