Data (mis)visualization From Data to Insight Dr. etinkaya-Rundel - PowerPoint PPT Presentation

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Data (mis)visualization From Data to Insight Dr. etinkaya-Rundel July 5, 2016 What is wrong with this visualization? Source: http://gizmodo.com/8-horrible-data-visualizations-that-make-no-sense-1228022038 2 What is wrong with this

Data (mis)visualization From Data to Insight Dr. Çetinkaya-Rundel July 5, 2016
What is wrong with this visualization? Source: http://gizmodo.com/8-horrible-data-visualizations-that-make-no-sense-1228022038 2
What is wrong with this visualization? Source: World Happiness Report (2012) http://www.earth.columbia.edu/articles/view/2960 3
What is wrong with this visualization? Source: https://eagereyes.org/blog/2008/ny-times-the-best-and-worst-of-data-visualization 4
What is wrong with this visualization? Source: http://viz.wtf/ 5
What is wrong with this visualization? Source: http://www.aul.org/new-leviathan/ 6
Redo Source: http://www.politifact.com/truth-o-meter/statements/2015/oct/01/jason-chaffetz/chart-shown- planned-parenthood-hearing-misleading-/ 7
Redo further Source: http://www.politifact.com/truth-o-meter/statements/2015/oct/01/jason-chaffetz/chart-shown- planned-parenthood-hearing-misleading-/ 8
One last look Source: http://www.politifact.com/truth-o-meter/statements/2015/oct/01/jason-chaffetz/chart-shown- planned-parenthood-hearing-misleading-/ 9
Scale matters! 10
Gallup Poll shows a minor increase in percentage of Americans without health insurance coverage. 11
Percentage of Americans Without Health Insurance Coverage 17 16 15 14 Jan'08 Jan'09 Jan'10 12
Percentage of Americans Without Health Insurance Coverage 17 16 15 14 Jan'08 Jan'09 Jan'10 13
Percentage of Americans Without Health Insurance Coverage 16.5 16.0 15.5 15.0 14.5 14.0 Jan'08 Jan'09 Jan'10 14
Percentage of Americans Without Health Insurance Coverage 16.5 16.0 15.5 15.0 14.5 14.0 Sep'08 Jan'09 Apr'09 15
Gallup Poll shows a substantial increase in percentage of Americans without health insurance coverage. Percentage of Americans Without Health Insurance Coverage 16.5 16.0 15.5 15.0 14.5 14.0 Sep'08 Jan'09 Apr'09 16
How substantial is the increase? 17
Does your visualization tell a story, or complicate a story? 18
What story does this visualization tell? 19
What story does this visualization tell? 20
Use a visualization when you can 21
Source: http://articles.latimes.com/2011/mar/18/health/la-he-birth-control-stats-20110316 22
In summary… 23
Tufte’s principles for graphical excellence 1.Above all else show the data. 2.Maximize the data-ink ratio. 3.Erase non-data ink. 4.Erase redundant data ink. 5.Revise and edit Source: Tufte, Edward R., and P. R. Graves-Morris. The visual display of quantitative information. Vol. 2. No. 9. Cheshire, CT: Graphics press, 1983. 24

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