Offshore Drilling. In the February 2013 article “Offshore Drilling Support High as Deepwater Horizon Oil Spill Trial Opens,”

E. Swanson reported on a HuffPost and YouGov poll that asked Americans what they think about increased offshore drilling for oil and natural gas. Of the 1000 U.S. adults surveyed, 280 said that they were opposed. Find a 99% confidence interval for the proportion of all U.S. adults who, at the time, opposed increased offshore drilling for oil and natural gas.