condition mean min max ZT0-3 2.163795 0.0 5.238379999999999 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 2.62969 2.5754 2.68398 ZT16-19 1.247635 1.247635 1.247635 ZT20-23 0.0 0.0 0.0