condition mean min max ZT0-3 0.2783678 0.0408516 0.515884 ZT4-7 0.7606189 0.7606189 0.7606189 ZT8-11 3.18057 3.18057 3.18057 ZT12-15 0 0 0 ZT16-19 0.5960934999999999 0.5960934999999999 0.5960934999999999 ZT20-23 0.47897999999999996 0.47897999999999996 0.47897999999999996