Box plots is a method of vonviently depicting groups of numerical data graphically and they are non-parametric. The tops of the boxes represent the 75th percentile or upper quartile and the bottom represents the 25th percentile or lower quartile. The data is divided into five summaries within the plots: smallest observation, lower quartile, median, upper quartile, and largest observation. The horizontal line within the box represents the median value. In this box plot the mileages of car travel is displayed according to the corresponding country.
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