August 2006 Daily Tracking Survey
Revised Final Topline, 10/05/06
Data for August 1 – 31, 2006
Princeton Survey Research Associates International for the Pew Internet & American Life Project
Sample: n = 2,928 adults 18 and older
Interviewing dates: 8.1.06 – 8.31.06
- Margin of error is plus or minus 2 percentage points for results based on the full sample [n=2,928]
- Margin of error is plus or minus 3 percentage points for results based on internet users [n=1,990]
The primary data reported in this memo come from a survey conducted by Princeton Survey Research Associates International between August 1, 2006 and August 31, 2006. For results based adult internet users (n=972), the margin of sampling error is plus or minus 3.5 percentage points.
The sample for the surveys 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 August 2006 survey was 27%.