condition mean min max ZT0-3 27.5613 27.5613 27.5613 ZT4-7 20.6828 20.6828 20.6828 ZT8-11 19.0106 19.0106 19.0106 ZT12-15 21.4321 21.4321 21.4321 ZT16-19 30.4833 30.4833 30.4833 ZT20-23 28.7066 28.7066 28.7066