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 0.02771825 0.0 0.0554365 ZT16-19 0.14065350000000001 0.070455 0.210852 ZT20-23 0 0 0