I am running a VPC stratified on CMT with N=14. When I looked at my file VPC_results I found the following for my CMT=11 and CMT=23. This resulted in a confidence interval for the 95 percentile at this time to be much higher than calculated independently with SAS. Is there a reason that this occurred and can it be corrected to give the proper N=14?
Andre VPC results strata CMT = 11 Continuous data 154 observations out of 294 < TIME <= median.idv no. of obs mean real first interval is closed -0.5 0.5 0 14 0 0.5 2.5 1.5 28 7.601134 2.5 3.5 3 14 9.25575 VPC results strata CMT = 23 Continuous data 140 observations out of 294 < TIME <= median.idv no. of obs mean real first interval is closed 0.5 1.5 1 14 0.2890893 1.5 2.5 2 14 0.5110357