condition mean min max ZT0-3 0.7984465 0.525218 1.071675 ZT4-7 0.704874 0.704874 0.704874 ZT8-11 0.560805 0.560805 0.560805 ZT12-15 0 0 0 ZT16-19 1.066524 1.066524 1.066524 ZT20-23 0.6572825 0.6572825 0.6572825