3. x = 1360, n = 2500, 99% confidence interval C. Find the sample size of the following. 1. 90% confidence level, E=3% 2. a = 0.02, E = 1%,q = 0.75 D. Answer the following. 1. A presidential candidate asks a polling organization to conduct a nationwide survey to determine the percentage of potential voters who would vote for him over his rival presidential candidate. Out of 2500 respondents in the sample, 925 said they would vote for him. a. What is the best point estimate of the true percentage of potential voters who would vote for him? b. Determine the margin of error with 95% confidence level