The margin of sampling error is plus or minus 3.5 percentage points.

MSN: Poll reveals baby boomers' retirement fears

Results for the full sample have a margin of sampling error of plus or minus 3.9 percentage points, it is larger for subgroups.

NPR: 50 Years On, Finding Profit In 'Truth' On JFK Case

The sampling error varied from question to question, but none had a margin of error exceeding 4.5 percentage points.

CNN: Poll: U.S. can win war, but won't