condition mean min max ZT0-3 0.12305770425 0.10331705699999999 0.1427983515 ZT4-7 0.33079017250000003 0.1806511625 0.48092918250000005 ZT8-11 2.2226604095 1.53517395 2.910146869 ZT12-15 5.4743180795 4.3114204234999995 6.637215735500001 ZT16-19 4.239328556749999 3.6626887129999997 4.8159684005 ZT20-23 8.255641773 6.4286906285 10.082592917500001