Definition:Quartile/Second

Definition

Let $D$ be a finite collection of data regarding some quantitative variable.

The second quartile of $D$ is defined as the median of $D$.

It is commonly denoted $Q_2$.

Also known as

• The term second quartile is often not used, and instead the median is referred to exclusively.

Also see

• Definition:Interquartile Range
• Definition:First Quartile
• Definition:Third Quartile

• Results about quartiles can be found here.

Sources

• 2011: Charles Henry Brase and Corrinne Pellillo Brase: Understandable Statistics (10th ed.): $\S 3.3$