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How to mislead with graphs 7’6” 5’2.5” Yao = Christina X 2? of course not…

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Presentation on theme: "How to mislead with graphs 7’6” 5’2.5” Yao = Christina X 2? of course not…"— Presentation transcript:

1 How to mislead with graphs 7’6” 5’2.5” Yao = Christina X 2? of course not…

2 How to mislead with graphs

3 Housing prices have tripled over the last year?!?

4 How to mislead with graphs Gee-whiz! Oatmeal cuts your cholesterol by 75%!

5 How to mislead with graphs

6

7 Use a short and fat bar if you want to minimize differences…

8 How to mislead with graphs Use a tall and skinny bar if you want to maximize differences…

9 How to mislead with graphs Or why not just scale it without the bottom part of the y-axis? Chop off the “feet”

10 How to mislead with graphs If I’m Mr. Jones… …I’m deliberately choosing a tall and skinny bar AND chopping off the bottom of the axis.

11 Reaganomics Tax Reduction Legislation televised address from the Oval Office, July 27, 1981

12 $999 $1000 $1001 $1003 $1002 $1004 $1005 “THEIR” bill is the Democratic plan “OUR” bill is the new Republican plan “YOUR TAXES” makes it nice and personal

13 How to mislead with graphs

14 pictographs...

15 How to mislead with graphs LA Times, August 5, 1979

16 How to mislead with graphs

17 Washington Post October 25, 1978

18 How to mislead with graphs No y-axis at all! Sales in 1995 = sales in 1997 but you’d never know!

19 How to mislead with graphs

20 An actual presentation from the county… click

21 A Radio Addvertisement from Express Oil Change Talking about dealers charging 37% more for the same work. This means the dealer will charge you $1.37 for the same work a private shop would charge a $1 for. Final example was “Would you like it if you give someone a dollar and asked for change, and they give you back 63 cents.” 63 cents is 37 cents less than a dollar, but what is wrong with the last example?


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