Reply #12: Thanks for being a poll watcher but the 3% audit is bullshit. Read and learn:

[Bill Bored]

Thanks for being a poll watcher. But you can't tell what a computer is doing by watching it. You have to hand count the ballots.

Look at these references:
http://www.electionaudits.org/node/14

Some of them are a bit too wishy-washy for my taste, but the one called "New York Audit Graphs" seems to address the 3% problem.