If you read a newspaper editorial there's a chance that the newspaper's position will use statistics to help them make their point. Statistical sources can do this for your research paper. The library's statistical sources can provide you with data that can help support a position you take about a topic. You can use them to show changes in public attitudes over time. Statistics round out your research and improve your papers.
If accessing these databases from off-campus, you will be required to log in using your username and password (last name and last four digits of your student ID).