condition mean min max ZT0-3 747.55 747.55 747.55 ZT4-7 337.0 337.0 337.0 ZT8-11 474.65 474.65 474.65 ZT12-15 765.25 765.25 765.25 ZT16-19 838.3 838.3 838.3 ZT20-23 821.6999999999999 821.6999999999999 821.6999999999999