Depicting Data
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Making it Comprehesnible
Depicting Data
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Depicting Data (adapted in part from Mandeville)
Graphical displays help make sense of raw data.
Can be an aid in analysisShould enhance overall communicationInvolves choices about what/how to display
What do you want to say? Are you trying to inform? Persuade?
Who do you want to say it to?Does data help to tell the story?
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Depicting DataShould tell a story (i.e. trends over time,
patterns)Relate back to the wholeOffers possibility of projections and
comparisons
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Common Types of VisualsGraphs/histograms
Bar chartsPie chartsLine charts
http://www.statcan.ca/english/edu/power/ch9/piecharts/pie.htm
Pictures/Concept mapsData mappingTables
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Improving CommunicationDouble-check dataKeep the message simpleVisuals should be able to speak for
themselves if done wellBe sure sequence is logicalRemember- different displays can impact
message
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Choosing DisplaysIf data is mostly qualitative/textual tables
are often preferableQuantitative data can often be best
displayed in histograms and graphsIn particular, quantitative data with 5 or
more data points are usually best displayed in graphs
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Choosing Displays (Census)
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Choosing Displays (Census)
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Effect of Choices on DisplaysOld Faithful
http://www.stat.sc.edu/~west/javahtml/Histogram.html
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Depicting data
Wicked Awesome Examples
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Info Maps
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Interactive DisplaysAchieving Visual Excellence
http://www.visual-literacy.org/stairs_of_viz/stairs_of_viz.html
Periodic Table of Visualization Methdshttp://www.visual-literacy.org/
periodic_table/periodic_table.htmlBaby Name Finder
http://www.babynamewizard.com/voyager#ms=false&exact=false
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ReferencesVisual Literacy
http://www.visual-literacy.org/pages/documents.htm
Tables vs. graphshttp://www.ncsu.edu/labwrite/res/
tablevsgraph/res-tablevsgraph.htmlVisual displays of data
www.nhhealthpolicyinstitute.unh.edu/ec/ppt/03_visual.ppt