The word quartile refers to dividing data into four equal parts, ensuring uniform distribution.

Equal Divisions

Quartiles are often specified as 'lower', 'middle', and 'upper' to denote their positions in the data set.

Positional Terms

Quartiles help describe the spread of values, showing how they're distributed across the dataset.

Using quartiles allows statisticians to understand and interpret complex data sets by breaking them down.

The interquartile range, the spread between middle quartiles, is key for understanding data variability.