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