A 95% confidence interval of 20.3 months to 46.3 months has been found for the mean duration of imprisonment, u, of political prisoners of a certain country with chronic PTSD. a. Determine the margin of error, E. b. Explain the meaning of E in this context in terms of the accuracy of the estimate. c. Find the sample size required to have a margin of error of 13 months and a 99% confidence level. (Use a = 38 months.) d. Find a 99% confidence interval for the mean duration of imprisonment, u. if a sample of the size determined in part (c) has a mean of 36.3 months. a. The margin of error is months. (Type an integer or a decimal.) Clear all Check a Help me solve this View an example Get more help - 3762 NOV W