Spring Tracking Survey 2008
Final Topline, 5/19/08
Data for April 8 – May 11, 2008
Princeton Survey Research Associates International for the Pew Internet & American Life Project
Sample: n = 2,251 adults, age 18 and older
Interviewing dates: 04.08.08 – 05.11.08
- Margin of error is plus or minus 2 percentage points for results based on total sample [n=2,251]
- Margin of error is plus or minus 3 percentage points for results based on internet users [n=1,553]
The results in this report are based on data from telephone interviews conducted by Princeton Survey Research Associates International between April 8 to May 11, 2008, among a sample of 2,251 adults, 18 and older. For results based Internet users (n=1,553), the margin of sampling error is plus or minus 3 percentage points.
The sample for this survey is a random digit sample of telephone numbers selected from telephone exchanges in the continental United States. The random digit aspect of the sample is used to avoid “listing” bias and provides representation of both listed and unlisted numbers (including not-yet-listed numbers). The design of the sample achieves this representation by random generation of the last two digits of telephone numbers selected on the basis of their area code, telephone exchange, and bank number. The response rate for the May 2008 survey was 25%.