condition mean min max ZT0-3 988.55 988.55 988.55 ZT4-7 878.2 878.2 878.2 ZT8-11 892.0 892.0 892.0 ZT12-15 896.4 896.4 896.4 ZT16-19 1043.6 1043.6 1043.6 ZT20-23 984.0 984.0 984.0