what is standard error in flexsurv standard error in survival what is flexsurv used for standard error in flexsurvreg standard error in flexsurverg average rate of exponential fit exponentially what is the standard error for survival does flexsurv estimate standard error what is flexsurv standard error standard error flexsurvreg flexsurv standard errors flexsurv standard error what is standard error flexsurvreg what is the standard error of flexsurv exponential fit standard error what is the standard error range flexsurvreg exponential standard error curve average rate of standard error standard error flexsurv what is flexsurv