condition mean min max ZT0-3 7.630955 2.30641 11.384944999999998 ZT4-7 0.18212 0.18212 0.18212 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 0.8928385000000001 0.8928385000000001 0.8928385000000001