condition mean min max ZT0-3 270.8 270.8 270.8 ZT4-7 377.1 377.1 377.1 ZT8-11 513.4 513.4 513.4 ZT12-15 529.5 529.5 529.5 ZT16-19 530.2 530.2 530.2 ZT20-23 331.7 331.7 331.7