Chap 1, Sec. 4: Calculating, Estimating, and Reading...
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Chap 1, Sec. 4: Calculating, Estimating, and Reading Graphs ❖ You should be able to use a calculator to add, subtract, multiply, divide, and to know if the result is in the ball park. ❖ You should be able to estimate answers without a calculator ❖ You should be able to interpret graphs such as pie charts, bar graphs, and line graphs. ❖ Don’t forget the Chapter Test it’s useful for reviewing the chapter. ' 2005-09, N. Van Cleave 1
Transcript of Chap 1, Sec. 4: Calculating, Estimating, and Reading...
Chap 1, Sec. 4: Calculating, Estimating, and ReadingGraphs
v You should be able to use a calculator to add, subtract, multiply,divide, and to know if the result is “in the ball park.”
v You should be able to estimate answers without a calculator
v You should be able to interpret graphs such as pie charts, bargraphs, and line graphs.
v Don’t forget the Chapter Test – it’s useful for reviewing thechapter.
© 2005-09, N. Van Cleave 1
Caveat
130,
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150,
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110,
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125,
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145,
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105,
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130,
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150,
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110,
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125,
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145,
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105,
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50,000
100,000
150,000
100.000
110,000
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150,000
0
Exaggerated differences — same numbers, different scales
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An Example of a Misleading Chart — from CNN
In the midst of the Terri SchiavoMedia/Political Frenzy, 2005
“. . . [I]t wasn’t just feckless pundits who were trying to turn thisstory into some kind of Republican vs. Democrat freak–fest —mainstream media outlets were desperate to get in on the act too.
CNN tried especially hard, even going so far as to produce somedubious graphics indicating that compared to Republicans andIndependents, Democrats were overwhelmingly in favor of removingTerri Schiavo’s feeding tube:”
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Note the scale on this graph. This is a classic example of how to “liewith statistics” - that is, to doctor a graph to make it produce anemotional, visual result. Thanks to Media Matters, here’s the graphon a scale from 0 to 100:
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“Wow... that doesn’t have quite the same impact, does it? In fact,if you take into consideration that the margin of error in the poll is7 percentage points, the results are pretty similar.”
From: http://www.democraticunderground.com/top10/05/191.html
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Who Owns the National Debt? (2008)
From: http://en.wikipedia.org/wiki/United States public debt#Foreign ownership
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Influenza Reports — 12/27/04
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Influenza Reports — 1/21/09
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Weather Forecast — 12/27/04
asp.usatoday.com/weather
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www.faireconomy.org/research/income_charts.html
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www.faireconomy.org/research/income_charts.html
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www.faireconomy.org/research/income_charts.html
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geocities.com/gordonite32/philo/incomes.htm
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geocities.com/gordonite32/philo/incomes.htm
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www.academycomputerservice.com/economics/charts.htm
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Income Based on Highest Education Attained
en.wikipedia.org/wiki/Household_income_in_the_United_States
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www.unfpa.org/6billion/pages/worldpopgrowth.htm
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