condition mean min max ZT0-3 556.85 556.85 556.85 ZT4-7 488.0 488.0 488.0 ZT8-11 518.2 518.2 518.2 ZT12-15 482.0 482.0 482.0 ZT16-19 527.35 527.35 527.35 ZT20-23 505.6 505.6 505.6