condition mean min max ZT0-3 1032.65 1032.65 1032.65 ZT4-7 1170.5 1170.5 1170.5 ZT8-11 916.85 916.85 916.85 ZT12-15 887.0 887.0 887.0 ZT16-19 953.8 953.8 953.8 ZT20-23 892.2 892.2 892.2