condition mean min max ZT0-3 1.10857 1.10857 1.10857 ZT4-7 0.262548 0.262548 0.262548 ZT8-11 1.1651500000000001 1.1651500000000001 1.1651500000000001 ZT12-15 5.790165 5.790165 5.790165 ZT16-19 3.7894900000000002 3.7894900000000002 3.7894900000000002 ZT20-23 1.63209 1.63209 1.63209