condition mean min max ZT0-3 0.023197725 0.0 0.04639545 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0.047270375 0.0452853 0.04925545 ZT16-19 0.01434895 0.0 0.0286979 ZT20-23 0 0 0