condition mean min max ZT0-3 0.212661 0.212661 0.212661 ZT4-7 0.09597 0.09597 0.09597 ZT8-11 0.078435 0.078435 0.078435 ZT12-15 0.0 0.0 0.0 ZT16-19 0.0 0.0 0.0 ZT20-23 0.3528435 0.3528435 0.3528435