Assume that a sample is used to estimate a population proportion p. Find the margin of error E that corresponds to the given statistics and confidence level. Round the margin of error to four decimal places. In a clinical test with 2300 subjects, 460 showed improvement from the treatment. Find the margin of error for the 99% confidence interval used to estimate the population proportion. 0.0122 0.0214 0.0187 0.0163