condition mean min max ZT0-3 0.21425711649999998 0.20129864099999997 0.227215592 ZT4-7 0.010544973249999999 0.0 0.021089946499999998 ZT8-11 0.00436872625 0.0 0.0087374525 ZT12-15 1.227487484 0.670487371 1.784487597 ZT16-19 1.64171734625 1.5312891755 1.7521455170000002 ZT20-23 2.225776036 1.9443870955 2.5071649765000004