condition mean min max ZT0-3 298.25 298.25 298.25 ZT4-7 95.9 95.9 95.9 ZT8-11 147.3 147.3 147.3 ZT12-15 153.5 153.5 153.5 ZT16-19 158.2 158.2 158.2 ZT20-23 246.2 246.2 246.2