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Box and Whisker Plots

Box plot is a tool to visually represent the range, interquartile range, median, mode, outliers, and all quartiles.

A box & whisker plot shows a "box" with left edge at Q1 , right edge at Q3 , the "middle" of the box at Q2 (the median) and the maximum and minimum as "whiskers".

Outliers in Box and Whisker Plots

The standard definition for an outlier is **the number which is less than Q1 or greater than Q3 by more than 1.5 times the interquartile range** ( IQR=Q3−Q1 ).

An outlier is any number less than Q1−(1.5×IQR) or greater than Q3+(1.5×IQR).

Last modified 2yr ago

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