May 17, 2005

Health Information Online

Methodology

November 2004 Activity Tracking Survey

The November 2004 Activity Tracking Survey, sponsored by the Pew Internet and American Life Project, obtained telephone interviews with a nationally representative sample of 914 adults living in continental United States telephone households. The interviews were conducted in English by Princeton Data Source, LLC from November 23 to November 30, 2004.  Statistical results are weighted to correct known demographic discrepancies.  The margin of sampling error for the complete set of weighted data is ±3.4%.  The margin of sampling error for Internet users [n=537] is ±4.4%.

Details on the design, execution and analysis of the survey are discussed in the questionnaire associated with this report.