condition mean min max ZT0-3 366.2 366.2 366.2 ZT4-7 338.6 338.6 338.6 ZT8-11 323.15 323.15 323.15 ZT12-15 517.3 517.3 517.3 ZT16-19 389.85 389.85 389.85 ZT20-23 316.8 316.8 316.8