Interquartile Range

The Interquartile Range (IQR) is the difference between Q3 and Q1, representing the middle 50% of the data. It's a robust measure of spread.

Formula: IQR = Q3 - Q1

Outlier Detection: Values below Q1 - 1.5×IQR or above Q3 + 1.5×IQR are considered potential outliers.