A poll involved interviews with 1,487 people and found that 42.3% of those interviewed were in favor of the candidate in question. The election will be held in three weeks.
a. Approximately what percentage of the entire population would say they were in favor of the candidate, if they were interviewed under the same conditions?
b. Give at least two reasons why the actual outcome of the election could differ from this 42.3% by more than the standard error.