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Lying with Statistics

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Title: Lying with Statistics


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(No Transcript)
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Where the Statistics Lie
3
Where the Statistics Lie
  • by
  • James Guffey
  • Professor of Mathematics
  • Truman State University

4
Quotes
There are three kinds of lies in the world
lies, damned lies, and statistics. -
Benjamin Disraeli
5
Quotes
Many people use statistics like a drunk uses a
lamp post ...
6
Quotes
Many people use statistics like a drunk uses a
lamp post ... more for support than for
illumination. - Andrew Lang
7
Quotes
It aint so much the things we dont know that
get us in trouble. Its the things we know that
aint so. - Artemus Ward
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Some things to consider
  • Is there any reason to suspect bias by the source
    of the results?
  • How were the data collected?
  • Are the data reasonable?
  • Are the data useful and relevant?
  • Are the graphs misleading?

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Choice Visa Card
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Choice Visa Card
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Choice Visa Card
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Smart Rate Discover Card
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Smart Rate Discover Card
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Smart Rate Discover Card
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How to Rig a Poll
I would be disappointed if Congress cut its
funding for public tv. Cuts would be...
Readers Digest, July 1995
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How to Rig a Poll
Cuts in funding for public tv are justified as
part of an overall effort to reduce federal
spending. Cuts would be...
Readers Digest, July 1995
17
Assessing Poll Results
  • Look for actual wording of the poll.
  • Beware of false choices.
  • Watch for selectively reported poll results.
  • Look warily at polls that delve into technical
    matters.
  • Be skeptical of polls commissioned by advocacy
    groups.

Readers Digest, July 1995
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Kirksville Daily Express, 2/8/2000
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Healthy Skepticism
Doubt is the beginning, not the end, of
wisdom. - Anonymous
20
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