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Definition of Box and whiskers plot
1. Noun. (context: statistics) A graphical summary of a numerical data sample through five statistics — median, upper quartile, lower quartile(,) and upper extreme and lower extreme values — by depiction as a box with its edges at the quartile marks and an internal line at the median and with lines protruding from the box as far as the extremal values. ¹
¹ Source: wiktionary.com