Organization and grouping of information in a graph can have an imapct on understanding

Two bar graphs can present more or less the same information but the way that information is grouped and organized can have a large impact on the viewers understanding of the information. In these two graphs, data concerning the various ways teens of different ages use their cell phone and how often they use it int this manner is presented.

The first graph conveys a much better understanding of the information though, because of the way that the information is organized, grouped, and presented.

In the first graph, the data is grouped by the form of usage rather than the teens age like it is in the second graph. This allows the viewer to compare between forms of usage for one particular  age group, but also across multiple age groups.

The first graph also presents the total percentage across all teens, which helps the viewer see the information in a larger context.

Both graphs also use color coding to differentiate between the bars, but the color coding is more effective in graph one because in graph two the viewer has to constantly check the key to verify which form of usage the bar is referring to, where as in graph one the viewer will always know that the darker the shade of blue, the higher the age.

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