During the debate over healthcare reform, 1180 randomly chosen U.S. adults were asked, "Do you favor a public option as part of any final healthcare reform legislation?" 725 of those surveyed responded "yes". Find a 95% confidence interval for the percent of U.S. adults who favored a public option. (Round percents to the nearest 0.1%) a. What is the sample proportion? b. What is the margin of error for a 95% confidence interval? C. The 95% confidence interval is from to