Problem 3 (Confidence Interval Estimation for Population Proportion). The coronavirus pandemic is altering the way students attend school. The admission's office at Carnegie Mellon University would like to have a sense of how this will affect its graduate programs. A sample of 500 students was surveyed. Among them 145 enrolled in an online program. (3.2) Moderate What will the confidence level be if we want our confidence interval to have a margin of error of 2%?