Decide the outcome, before the trial!

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Presentation transcript:

Decide the outcome, before the trial! Lying with Statistics Decide the outcome, before the trial!

Did you know that 95% of polls are done by people who've already decided the results?. 75% of people who read polls believe them unquestioningly. Polls have an average of plus or minus 10% tracking error. 85% of politicians use tracking polls to make decisions that effect your life. 100% of these statistics have been fabricated. It's amazing how authorative you can sound just by quoting some statistics... http://m2.aol.com/johng101/lying.htm

Same data, 4 Displays What does each graph make you think is happening to the frogs? http://www.physics.csbsju.edu/stats/display.html

Same Data - Different Graphs Respond to this graph. What is it telling you?

Samd Data - Different Graphs How does your response to this graph differ from your response to the previous one?

Same Data - Different Graphs How does your response to this graph differ from your response to the previous ones? How is it different?

Same Data - Different Graphs How does your response to this graph differ from your response to the previous ones? How is it different?

Same Data - Different Graphs How does your response to this graph differ from your response to the previous ones? How is it different?

Same Data - Different Graphs How does your response to this graph differ from your response to the previous ones? How is it different? Can we just use this one?

Poor Scale Is it increasing quickly? or Is it increasing slowly?

Better Scale

What we are going to learn today: Statistics can be used to validate claims. Statistics can be misused to appear to validate claims. How do we know the difference?