condition mean min max ZT0-3 46.95 46.95 46.95 ZT4-7 69.6 69.6 69.6 ZT8-11 55.25 55.25 55.25 ZT12-15 69.4 69.4 69.4 ZT16-19 42.0 42.0 42.0 ZT20-23 41.8 41.8 41.8