condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.0 0.0 0.0 ZT8-11 0.062552 0.062552 0.062552 ZT12-15 0.041112 0.041112 0.041112 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0 0.0 0.0