condition mean min max ZT0-3 838.9 838.9 838.9 ZT4-7 1371.7 1371.7 1371.7 ZT8-11 1281.35 1281.35 1281.35 ZT12-15 916.55 916.55 916.55 ZT16-19 569.55 569.55 569.55 ZT20-23 665.9 665.9 665.9