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

Histogram

A histogram is a graphical display of tabulated frequencies. It shows what proportion of cases fall into each of several categories. There is a difference between a histogram and a bar chart in the sense that it is the area of the bar that dictates the value, not the height, which is a very important difference particularly when the variables are not all the same width. The histogram above show the different employee's salaries.



http://www.whizdog.com/qmblog/images/histogram_032005_5927_image001.gif

Parallel Coordinate Graph

Multivariate relations are obtained through the use of parallel coordinate graphs. Specific properties of the relationship correspond to the geometrical properties of the graph. This is a parallel cooridinate graph of baseball statistics. It shows statistics from many different players. The top of the graph is the lead for that particular statistic.


http://www.matthewtavares.com/baseball_report/graph_allteams.bmp