nag_surviv_kaplanmeier (g12aac) Example Program Results Time Survival Standard probability deviation 6.0 0.857 0.076 7.0 0.807 0.087 10.0 0.753 0.096 13.0 0.690 0.107 16.0 0.627 0.114 22.0 0.538 0.128 23.0 0.448 0.135