condition mean min max ZT0-3 0.01263538625 0.0 0.0252707725 ZT4-7 0.15072827225000002 0.099346496 0.2021100485 ZT8-11 0.138384114 0.1378326185 0.1389356095 ZT12-15 0.36465079 0.15306246350000002 0.5762391165 ZT16-19 0.52253124125 0.3625735415 0.6824889409999999 ZT20-23 0.8608992725 0.522198437 1.199600108