condition mean min max ZT0-3 30.681872 30.681872 30.681872 ZT4-7 29.571495 29.571495 29.571495 ZT8-11 42.4525895 42.4525895 42.4525895 ZT12-15 43.8298845 43.8298845 43.8298845 ZT16-19 42.0770455 42.0770455 42.0770455 ZT20-23 28.1645745 28.1645745 28.1645745