condition mean min max ZT0-3 880.3 880.3 880.3 ZT4-7 959.6 959.6 959.6 ZT8-11 826.1500000000001 826.1500000000001 826.1500000000001 ZT12-15 895.95 895.95 895.95 ZT16-19 851.8 851.8 851.8 ZT20-23 828.2 828.2 828.2