1. ?

2. Art and Science of Graphical Presentation
Chapter 3
Art and Science of Graphical Presentation

3. 3.2 Graphical Excellence
“Graphical excellence” deals with the effective use of graphical techniques.
Effective graphical techniques are
informative,
concise,
clear presentation of the data to the viewer.
How can we achieve graphical excellence?

4. Graphical excellence is achieved when
The graph presents large data sets concisely and coherently.
The ideas and concepts to be delivered are clearly understood to the viewer.
The graph encourages the viewer to compare variables.
The display induces the viewer to address the substance of the data and not the form of the graph.
There is no distortion of what the data reveal.

5. 3.3 Graphical Deception
It is important to be able to evaluate critically the information presented by graphical techniques.
Things to be cautious about when observing a graph:
Is there a missing scale on one axis.
Do not be influenced by a graph’s caption.
Are changes presented in absolute values only, or in percent form too.

6. ? Has any axis been stretched? 10% Dollars
Is there a missing scale on one axis.
Are changes presented in absolute values only,
or in percent form too. ?
(3%)
120.0
(2%)
110.0
(1%)
100.0
Time
Time
Has any axis been stretched?
10%
Dollars
10%
Aug. 98
Sept. 98
1980
1985
1990