N ATIONAL D EFORESTATION R ATES C -> Q

T YPE OF S TUDY Paired, Two-Sample, or Multi-Sample? Paired Study Comparing the amount of forest cover in each nation in 1990 to the amount in AND- Multi-Sample Study In the article countries are grouped into samples by continent.

D ATA A CQUISITION 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

D ATA P RESENTATION Deforestation Rates of Nations Categorized by Continent Excluding countries with less than 1,000,000 hectares of forest and those with insufficient data

D ATA P RESENTATION

S AMPLE ? 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

B IAS ? Country/area Population total 1990 (‘000) Population Growth Rate (%) Forest Total in 2000 ('000 ha) Forest: % of land area 2000 (%) Forest Change (‘000 ha) Forest Annual rate of change (%) Brazil167, , , World5,978, ,869, ,

D ATA P RESENTATION 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

D ATA P RESENTATION