condition mean min max ZT0-3 73.25 73.25 73.25 ZT4-7 77.9 77.9 77.9 ZT8-11 104.8 104.8 104.8 ZT12-15 98.7 98.7 98.7 ZT16-19 139.2 139.2 139.2 ZT20-23 95.9 95.9 95.9