Statistics can be a great way to quantify your research. Be sure to evaluate the sources of your statistical information, however, to make sure they come from unbiased sources. Government agencies (such as the U.S. Census Bureau) are generally considered reliable. Statistical information gathered from a commercial entity should be used with caution and evaluated for accuracy and authority.
Contact the Librarian if you need assistance, or if you are unsure of the validity of the statistics you gather during research.
"USA.gov is the U.S. government’s official search engine. It is a comprehensive, searchable index of about 50 million pages from federal, state, local, territorial, and tribal websites." This search site leverages Bing's index of government pages.