Box plot charts show the medium, average, top and bottom 25% distributions of some dispersed scatter values.
Our Sales by Country demo charts show statistics on product quantities sold between 2000 and 2016 in US, France and UK. Each country is represented by a different bar. But they all have the same color, because this is still a single-series chart. The small horizontal bar in the middle shows where points are equally divided into the upper and lower area: this is the median value. Upper and lower quartiles, at +/-25% of the whole height, form the bar. The upper and lower extremities of the whisker complete the picture.