condition mean min max ZT0-3 0.30408267024999996 0.143690503 0.46447483749999996 ZT4-7 0.641053197 0.5826968065 0.6994095874999999 ZT8-11 0.41769696575 0.314937001 0.5204569305 ZT12-15 0.9442282565 0.8512445565000001 1.0372119565 ZT16-19 1.65559786225 1.356464517 1.9547312075 ZT20-23 1.9490587695000001 1.8228436585 2.0752738805