condition mean min max ZT0-3 5459.8 5459.8 5459.8 ZT4-7 3303.9 3303.9 3303.9 ZT8-11 3149.5 3149.5 3149.5 ZT12-15 3473.5 3473.5 3473.5 ZT16-19 2901.3500000000004 2901.3500000000004 2901.3500000000004 ZT20-23 3677.45 3677.45 3677.45