condition mean min max ZT0-3 3944.7 3944.7 3944.7 ZT4-7 4235.2 4235.2 4235.2 ZT8-11 4145.5 4145.5 4145.5 ZT12-15 4096.3 4096.3 4096.3 ZT16-19 4421.05 4421.05 4421.05 ZT20-23 4484.25 4484.25 4484.25