OECD: The Organization for Economic Cooperation and Development $($OECD$)$ tracks different summary statistics of its member countries. Two important variables are per capita GDP $($Gross Domestic Product$)$ and trade balances $($measured as a percentage of GDP$).$ Exporting countries tend to have large positive trade balances while importing countries tend to have negative trade balances. Use the OECD Date file posted on Canvas, which has data from the $2005$ OECD report, to answer the following questions: