condition mean min max ZT0-3 0.01895505 0.0 0.0379101 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0.0 0.0 0.0 ZT16-19 0.016495583333333334 0.0 0.03299116666666667 ZT20-23 0 0 0