condition mean min max ZT0-3 0.053596650749999995 0.0 0.10719330149999999 ZT4-7 0.65667364325 0.1398704805 1.173476806 ZT8-11 2.26604717675 1.5290613865 3.003032967 ZT12-15 4.50267452175 4.0381630555 4.967185988 ZT16-19 2.819332843 2.3369599675000003 3.3017057185 ZT20-23 1.99643822025 1.980042847 2.0128335935