condition mean min max ZT0-3 0.06424091366666666 0.043826779 0.08465504833333333 ZT4-7 0.0741322465 0.0 0.148264493 ZT8-11 0.7007378095 0.23022785799999998 1.171247761 ZT12-15 0.10434916 0.0 0.20869832 ZT16-19 0.029810368 0.0 0.059620736 ZT20-23 0.0 0.0 0.0