condition mean min max ZT0-3 509.29999999999995 509.29999999999995 509.29999999999995 ZT4-7 1462.1 1462.1 1462.1 ZT8-11 1544.6999999999998 1544.6999999999998 1544.6999999999998 ZT12-15 919.75 919.75 919.75 ZT16-19 1070.35 1070.35 1070.35 ZT20-23 891.0 891.0 891.0