condition mean min max ZT0-3 3458.1000000000004 3458.1000000000004 3458.1000000000004 ZT4-7 4849.4 4849.4 4849.4 ZT8-11 3459.25 3459.25 3459.25 ZT12-15 4164.5 4164.5 4164.5 ZT16-19 3408.1 3408.1 3408.1 ZT20-23 3245.55 3245.55 3245.55