condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0.024308916666666666 0.0 0.04861783333333333 ZT16-19 0.0297833 0.0297833 0.0297833 ZT20-23 0.0 0.0 0.0