Romano, Andrew. "How Dumb Are We?"
Newsweek, March 20, 2011
Newsweek made a survey and asked random American Citizens to take America's official citizenship test that lead to not very promising results. Out of 1000 Americans, 29% couldn't name Vice President, 73% didn't know the reasons of Cold War, 44% were ignorant of Bill Rights and 6% were not able to name the Independence Day.
For the rest of the article, the author tries to find possible reasons for the ignorance overwhelming the country and ways to solve this problem. These reasons include: complexity of US political system, existence of lot of poor people who have no excess to education, decentralized education system, etc. Whatever the reason might be, it's not impossible, but it definitely needs time to correct the situation.
The survey was made by Newsweek and the sponsor is undisclosed. Results were communicated in a very clear manner but there were no graphs used.