condition mean min max ZT0-3 3472.6499999999996 3472.6499999999996 3472.6499999999996 ZT4-7 2716.2 2716.2 2716.2 ZT8-11 2425.3500000000004 2425.3500000000004 2425.3500000000004 ZT12-15 2409.45 2409.45 2409.45 ZT16-19 2730.55 2730.55 2730.55 ZT20-23 3339.0 3339.0 3339.0