Measures of central tendency, variability, and data description
What is interquartile range (IQR)?
The range between the first and third quartiles, representing the middle 50% of data.
Example: For Q1 = 25 and Q3 = 75: IQR = 50
Note: Robust to outliers; used to identify outliers (1.5 × IQR rule); foundation of boxplots
