condition mean min max ZT0-3 0.03472293333333333 0.0 0.060983 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0.011601875 0.0 0.02320375 ZT16-19 0.0202765 0.0202765 0.0202765 ZT20-23 0.022049 0.022049 0.022049