condition mean min max ZT0-3 65.2 65.2 65.2 ZT4-7 42.0 42.0 42.0 ZT8-11 44.8 44.8 44.8 ZT12-15 41.95 41.95 41.95 ZT16-19 52.5 52.5 52.5 ZT20-23 52.85 52.85 52.85