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In [[descriptive statistics]], a '''box plot''' (also known as a '''box-and-whisker diagram''') is a convenient way of graphically depicting the [[five-number summary]], which consists of the smallest observation, lower [[quartile]], [[median]], upper [[quartile]] and largest observation.
Box plots are able to visually show different types populations, without any assumptions of the [[probability distribution|statistical distribution]]. The spacings between the different parts of the box can help indicate [[variance]], [[skewness|skew]] and identify [[outlier]]s.
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