condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.205847 0.205847 0.205847 ZT8-11 0.1582065 0.1582065 0.1582065 ZT12-15 0.0 0.0 0.0 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0907895 0.0907895 0.0907895