11_graphs - Plots, Graphs and Pictures • Graphs can...

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Unformatted text preview: Plots, Graphs and Pictures • Graphs can convey a story relatively quickly • They can also reveal things that would be difficult to see by, say, looking at raw numbers • If done poorly, they can obscure meaning • We discussed how to display ratio data with histograms Categorical data • Pie chart- Shows the percentage of cases in each category • Usually display one categorical variable 2005 federal budget Source: Budget of the United States, FY 2005 Excerpt of 538.com’s Analysis of 2008 elections Colors in Flags • http://shaheeilyas.com/flags/ Categorical Data • Bar graphs also show the percentage of cases in each category, but can show more than one variable • The height of the bars show the percentage of cases in each category • Bars can be displayed vertically or horizontally NH survey-is second hand smoke a health hazard?...
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This note was uploaded on 01/27/2011 for the course COM 200 taught by Professor Tamborini during the Fall '09 term at Michigan State University.

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11_graphs - Plots, Graphs and Pictures • Graphs can...

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