Dear List>From a sample size of 40 I have calculated retrun level values for 2,5,10,25,50 and 100 years using a exponentail disrtibution as follows;Now how can I calculate confidence interval for each return levels? seeking your help. Thank you yr return level 2 1.980421 5 4.598394 10 6.578815 25 9.196788 50 11.17721 100 13.15763 [[alternative HTML version deleted]]