condition mean min max ZT0-3 0.44144175 0.35678 0.5261035000000001 ZT4-7 0.17715595 0.17715595 0.17715595 ZT8-11 0.40557550000000003 0.40557550000000003 0.40557550000000003 ZT12-15 0 0 0 ZT16-19 0.39445600000000003 0.39445600000000003 0.39445600000000003 ZT20-23 0.4844635 0.4844635 0.4844635