The editors of scientific american are able to obtain a representative sample of their readers in order to assess their attitudes toward preservation of the rainforests in costa rica. when interpreting the results of their survey, the editors will be able to

I believe the answer is: apply the results to subscribers of Scientific American

Scientific American is a private publication that has garnered a reputation as a trusted platform to introduced latest development of scientific field across the world. Many famous/notable scientists introduced their paper through this platform, including Albert einstein.

Currently, as of february 2016, an american traveling in france would be by the exchange rate. the weakness of the euro and the strength of the us dollar means that items in france cost less to an american than they otherwise would. of course, if this trend reverses and the us dollar weakens and the euro strengthens, such as was happening in early 2008, an american traveling in france would have an adverse experience because items would cost relatively more.