condition mean min max ZT0-3 130.7 130.7 130.7 ZT4-7 84.3 84.3 84.3 ZT8-11 77.05 77.05 77.05 ZT12-15 104.6 104.6 104.6 ZT16-19 86.0 86.0 86.0 ZT20-23 107.5 107.5 107.5