condition mean min max ZT0-3 33.968149999999994 33.968149999999994 33.968149999999994 ZT4-7 32.3801 32.3801 32.3801 ZT8-11 23.83015 23.83015 23.83015 ZT12-15 23.67125 23.67125 23.67125 ZT16-19 31.85125 31.85125 31.85125 ZT20-23 32.4671 32.4671 32.4671