condition mean min max ZT0-3 4405.95 4405.95 4405.95 ZT4-7 2272.6 2272.6 2272.6 ZT8-11 2453.05 2453.05 2453.05 ZT12-15 3209.3999999999996 3209.3999999999996 3209.3999999999996 ZT16-19 3866.8500000000004 3866.8500000000004 3866.8500000000004 ZT20-23 3949.55 3949.55 3949.55