Ashish and Jon
Question: Should Michael Vick still be allowed to play in the NFL after his dog scandal?

Population: Football Fans

Parameter of Interest: the true proportion (%) of people who believe Michael Vick should still be allowed to play

Non Response
Conduct a facebook survey. You only have 350 friends. Minimal reply is 25 people

Voluntary Response
Going to an Eagles game and surveying 100 people

Undercoverage
Only surveying Eagles fans

Response Bias
"Michael Vick killed dogs. Do you think he should still play in the NFL?"