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Concept

Interquartile Range

The interquartile range, or IQR, of a data set is a measure of spread that measures the difference between Q_3 and Q_1, the upper and lower quartiles.

IQR=Q_3-Q_1

The following applet shows how to find the IQR of different data sets.

Applet that calculates the interquartile range of a data set

Exercises

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