Wondering how many people in the United States have a smartphone? If you poll 20 people on the street, your survey won’t be representative of the entire American population. But if you just want to ...

Survey questions raising concerns in middle schools: *The last time you engaged in sexual activity, did you use one of the following to protect yourself from sexually transmitted diseases (STDs)?

This guide was reviewed by a Business News Daily editor to ensure it provides comprehensive and accurate information to aid your buying decision. As a responsible business owner, you probably think ...

A behind-the-scenes blog about research methods at Pew Research Center. For our latest findings, visit pewresearch.org. Among the tools that survey researchers use to gain a deeper understanding of ...