Standard Statistical Charts

Bar and Column

Line

Scatterplots http://soc125ppol225.wikispot.org/Excel_Scatterplot

Pie Charts

Tables vs. Charts

Charts, Graphs, Tables, and Presentations

Distinctions

Charts, graphs, plots refer to graphical representations of data. They include histograms, bar charts, line graphs, pie charts, etc.

Tables are arrangements of rows and columns of data.

“Data graphics visually display measured quantities by means of the combined use of points, lines, a coordinate system, numbers, symbols, words, shading, and color” Tufte 1983, 1

Goals of Graphical Excellence (after Tufte)

“…complex quantitative ideas communicated with clarity, precision, and efficiency” (51)

Show the data

Induce reader to think about substance

Avoid distorting data

Present many numbers in small space

Make the large and complex coherent

Encourage comparisons

Reveal multiple levels of detail in data

Serve a well-defined purpose

Connect with textual descriptions and tabular presentations of data

Overall

Multivariate

Truth

TYPES OF CHARTS

Data Maps

Time Series

Time Space Charts

Small Multiples

Integrity

Area and the Lie Factor

Baselines

The Anatomy of a Chart

Types of Charts

Basic data set : cases by variables. Common secondary version is values by frequency.

Bar Charts

One set of data

Good for comparing absolute frequency of categorical variables.

Caution when classes are of different “widths” or “open-ended”

Frequency histogram as most common

Grouped Bar

As above but more than one set of data

Stacked Bar

Use when categories are subsets of a whole and mutually exclusive and (probably) exhaustive.

Stack Bar 100%

Useful for showing comparative composition.

Line Charts

X-Y Charts

Pie Charts