condition mean min max ZT0-3 0.08023374999999999 0.065089 0.0953785 ZT4-7 0.359399 0.359399 0.359399 ZT8-11 0.3928875 0.3928875 0.3928875 ZT12-15 0 0 0 ZT16-19 0.0961414 0.0961414 0.0961414 ZT20-23 0.12847945 0.12847945 0.12847945