<meta http-equiv="refresh" content="1; url=/nojavascript/">
You are viewing an older version of this Concept. Go to the latest version.

# Quartiles

## Introducing data for box-and-whisker plots

%
Progress
Practice Quartiles
Progress
%
Quartiles

### Vocabulary Language: English

Extremes

Extremes

The extremes are the maximum and minimum values in a data set.
first quartile

first quartile

The first quartile, also known as $Q_1$, is the median of the lower half of the data.
Lower quartile

Lower quartile

The lower quartile, also known as $Q_1$, is the median of the lower half of the data.
Median

Median

The median of a data set is the middle value of an organized data set.
Quartile

Quartile

A quartile is each of four equal groups that a data set can be divided into.
second quartile

second quartile

The second quartile, also known as $Q_2$, is the median of the data.
third quartile

third quartile

The third quartile, also known as $Q_3$, is the median of the upper half of the data.
Upper Quartile

Upper Quartile

The upper quartile, also known as $Q_3$, is the median of the upper half of the data.