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DESCRIBING DATA GRAPHICALLY

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by

Jennifer Edmonds, PhD

on 21 September 2016

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Transcript of DESCRIBING DATA GRAPHICALLY

Frequency
Distributions
Pie charts show how a whole is divided into parts
Good for showing percentages (that add up to 100%)
To avoid misleading interpretations, use traditional bars as opposed to pictures…
Describing Data
Bar Charts
Bar charts are commonly used to compare groups
compare the numerical values across categories
Pie Charts
Line Charts
A frequency distribution is a data table that arranges data by categories with their corresponding frequencies.
Histograms
Scatterplots
Used to visualize relationships between two variables.
http://www.ted.com/playlists/56/making_sense_of_too_much_data
Making Sense of Too Much Data
http://criticalassumption.blogspot.com/2010/08/when-good-charts-go-bad.html
http://www.presentationzen.com/
charts that compare ACROSS categories
(need labels to describe categories)
you ALWAYS need a title
The different types of data lead to different types of data preparation

(different ways to describe data)…
Qualitative
vs.
Quantitative
http://www.slideshare.net/Visage/data-visualization-101-how-to-design-chartsandgraphs?from_action=save
http://www.slideshare.net/Visage/data-visualization-101-how-to-design-chartsandgraphs?from_action=save
http://www.slideshare.net/Visage/data-visualization-101-how-to-design-chartsandgraphs?from_action=save
charts that compare WITHIN categories
http://www.slideshare.net/Visage/data-visualization-101-how-to-design-chartsandgraphs
http://www.slideshare.net/Visage/data-visualization-101-how-to-design-chartsandgraphs
Pie charts also show the DISTRIBUTION of the data
Full transcript