condition mean min max ZT0-3 31.8 31.8 31.8 ZT4-7 52.0 52.0 52.0 ZT8-11 24.3 24.3 24.3 ZT12-15 47.95 47.95 47.95 ZT16-19 50.15 50.15 50.15 ZT20-23 32.0 32.0 32.0