condition mean min max ZT0-3 30.16515 30.16515 30.16515 ZT4-7 35.817899999999995 35.817899999999995 35.817899999999995 ZT8-11 33.9725 33.9725 33.9725 ZT12-15 32.5817 32.5817 32.5817 ZT16-19 24.28735 24.28735 24.28735 ZT20-23 25.815649999999998 25.815649999999998 25.815649999999998