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Quartiles

Introducing data for box-and-whisker plots

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Quartiles
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Vocabulary

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.

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