condition mean min max ZT0-3 1148.6999999999998 1148.6999999999998 1148.6999999999998 ZT4-7 852.1 852.1 852.1 ZT8-11 906.7 906.7 906.7 ZT12-15 929.1500000000001 929.1500000000001 929.1500000000001 ZT16-19 1090.35 1090.35 1090.35 ZT20-23 1155.8 1155.8 1155.8