condition mean min max ZT0-3 539.2 539.2 539.2 ZT4-7 440.1 440.1 440.1 ZT8-11 529.45 529.45 529.45 ZT12-15 455.9 455.9 455.9 ZT16-19 641.4 641.4 641.4 ZT20-23 763.1 763.1 763.1