Sample Size Calculator
Scientific Calculator
Statistical Power & Sample Size
Updated 2/19/07
Arteology
The Science of Design
Telephone Sampling Q & A
Europa: Public Opinion Analysis of the European Commission
FedStats
Geostat: County & City Databooks
GSS Data
ICPSR Data Warehouse
NCJRS Stats
North American Data Archives
Roper Center for Public Opinion Research
SPSS
StatLib
U.S. Census Bureau
Virginia Stats
World Bank Institute: Governance Datasets
World Values Survey
The Measurement Group.com
American Statistical Association
Association for Institutional Research
Gallop Poll
Harris Poll
Pew Research Center
Pollingreport.com
