condition mean min max ZT0-3 6.596309025749999 4.655598965 8.537019086499999 ZT4-7 18.4701375375 12.684722885 24.25555219 ZT8-11 9.37163827825 5.9357949375 12.807481619 ZT12-15 0.695326927 0.3733331590000001 1.017320695 ZT16-19 0.260026007 0.21602051149999998 0.3040315025 ZT20-23 0.16289751624999999 0.12721478949999998 0.198580243