Box plot

source - http://connectmv.com/tutorials/r-tutorial/basic-plots-in-r/

This is an example of an box plot. A box plot is way to group together a set of data in a convenient way. It graphs the data set of different categories so that you can compare them to one another.There are five numbers that are summarized through one of these boxes. WHich are minimum, first quartile, median, third quartile, and maximum. The top line of the box is the third quartile and the bottom line is the first quartile and the space between the two is called the interquartile range. The line within the rectangular box is known as the median of the data.  The whiskers that are attacked to the box are maximum which is above and minimum is below.