condition mean min max ZT0-3 28.235149999999997 28.235149999999997 28.235149999999997 ZT4-7 28.1284 28.1284 28.1284 ZT8-11 19.459049999999998 19.459049999999998 19.459049999999998 ZT12-15 15.4896 15.4896 15.4896 ZT16-19 22.61815 22.61815 22.61815 ZT20-23 25.619549999999997 25.619549999999997 25.619549999999997