condition mean min max ZT0-3 1.00669825 0.945338 1.0680585 ZT4-7 1.069 1.069 1.069 ZT8-11 1.43859 1.43859 1.43859 ZT12-15 0 0 0 ZT16-19 1.7055150000000001 1.7055150000000001 1.7055150000000001 ZT20-23 1.60084 1.60084 1.60084