condition mean min max ZT0-3 0.9346183333333333 0.0 2.803855 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 1.443305 0.0 2.88661 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0 0.0 0.0