NATIONAL DEFORESTATION RATES

C -> Q

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.

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

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

DATA PRESENTATION

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

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

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

DATA PRESENTATION