Question

A USA Today / Gallup Poll conducted July 25-27, 2008, asked adults nationwide, what is your favorite summer olympics event? Among 1,007 adults surveyed, 27% said swimming, 18% said track and field, and 12% said gymnastics. (There were the top three responses; many other sports were mentioned, and 20% had no favorite or were unsure what sport was their favorite.)

1. Find a 95% confidence interval for the percentage of American adults who considered track and field their favorite summer olympics event.

2. What is the margin of error for this confidence interval?

3. List the conditions you checked before finding that confidence interval and explain why each was satisfied (along with any assumptions you maid).

Answer 1