Hi,
My data set is currently structured to estimate monthly survival over a period of 32 months. The monthly survival estimate is 0.96 (SE=0.01). I want to calculate an annual survival estimate, which is calculated by multiplying the survival estimate by 12 months. This yields an estimate of 0.59; however, I'm interested in calculating the standard error, lower and upper confidence limits on this estimate. What is the best approach to derive these values?
Thanks!