condition mean min max ZT0-3 0.02603125 0.0 0.0520625 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0 0 0 ZT16-19 0.02627395 0.02627395 0.02627395 ZT20-23 0.0262438 0.0262438 0.0262438