condition mean min max ZT0-3 1.0654866666666667 0.0 3.19646 ZT4-7 2.910535 2.910535 2.910535 ZT8-11 0.0 0.0 0.0 ZT12-15 0.0 0.0 0.0 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0 0.0 0.0