National Deforestation Rates - PowerPoint PPT Presentation

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National Deforestation Rates

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NATIONAL DEFORESTATION RATES C - Q TYPE OF STUDY Paired, Two-Sample, or Multi-Sample? ... Also only includes nations in the U.N. Taiwan and Vatican City BIAS? – PowerPoint PPT presentation

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Title: National Deforestation Rates


1
National Deforestation Rates
  • C -gt Q

2
Type of Study
  • Paired, Two-Sample, or Multi-Sample?
  • Paired Study
  • Comparing the amount of forest cover in each
    nation in 1990 to the amount in 2000 -AND-
  • Multi-Sample Study
  • In the article countries are grouped into samples
    by continent.

3
Data Acquisition
  • Where was the deforestation data for this article
    obtained?
  • The United Nations Food and Agriculture
    Organization (UNFAO)
  • How did the UN most likely obtain this
    information? (experiment or observational
    study?)
  • Observational Study

4
Data Presentation
  • Deforestation Rates of Nations Categorized by
    Continent
  • Excluding countries with less than 1,000,000
    hectares of forest and those with insufficient
    data

5
Data Presentation
6
Sample?
  • Are these results for a sample or a population?
  • Sample (only includes nations with sufficient
    data)
  • Population (takes all nations into
    consideration)
  • Also only includes nations in the U.N.
  • Taiwan and Vatican City

7
Bias?
Country/area Population total 1990 (000) Population Growth Rate () Forest Total in 2000 ('000 ha) Forest of land area 2000 () Forest Change 1990-2000 (000 ha) Forest Annual rate of change 1990-2000 ()
Brazil 167,988 1.3 543,905 64.3 -2,309 -0.4
World 5,978,143 1.3 3,869,455 29.6 -9,391 -0.2
8
Data Presentation
  • Deforestation Rates of Nations Categorized by GDP
    per Capita
  • Excluding countries with less than 1,000,000
    hectares of forest and those with insufficient
    data

9
Data Presentation
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