The graph on which statistician plot these values is called a Box and Whisker plot. This five value summary is visually plotted to make the spread of data more visible to the users. In statistics, a five-number summary of Minimum Value, First Quartile, Median, Last Quartile and Maximum value is something we want to know in order to have a better idea about the spread of the data given. Excel functions, formula, charts, formatting creating excel dashboard & others What is a Box Plot?