condition mean min max ZT0-3 178.55 178.55 178.55 ZT4-7 94.5 94.5 94.5 ZT8-11 105.3 105.3 105.3 ZT12-15 106.9 106.9 106.9 ZT16-19 204.8 204.8 204.8 ZT20-23 180.85 180.85 180.85