If, based on a sample size of 900, a political candidate finds that 549 people would vote for him in a two-person race, what is the 95% confidence interval for his expected proportion of the vote? Would he be confident of winning based on this poll? A 95% confidence interval for his expected proportion of the vote is [0.5781, 0.6419]. (Use ascending order. Round to four decimal places as needed.) Would he be confident of winning based on this poll? He should be confident of winning because the upper limit is/are above 50%.