Box Plot

Box plots are very useful to graph groups of numerical data through their five number summaries. It was invented in 1977 by John Tukey who was an American. They are also used to depict differences in populations without making assumptions on statistical distribution. This is a Box Plot of votes favoring the Coalition TPP. The majority of rural voters voted in favor, while less than half of the voters in the Inner Metro area were not in favor.


http://www.ozpolitics.info/election2004/e2004-boxpolt-seat-type-by-CTPP-vote.png