condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0088854305 0.0 0.017770861 ZT12-15 0.0 0.0 0.0 ZT16-19 2.0362970566666667 0.0 4.072594113333333 ZT20-23 0.0 0.0 0.0