A national television network takes an exit poll of 1400 voters after each has cast a vote in a state gubernatorial election. Of them, 660 say they voted for the Democratic candidate and 740 say they voted for the Republican candidate.
a. Treating the sample as a random sample from the population of all voters, would you predict the winner? Base your decision on a 95% confidence interval.
b. Base your decision on a 99% confidence interval. Explain why you need stronger evidence to make a prediction when you want greater confidence.