condition mean min max ZT0-3 0.22439057075000002 0.22394577699999998 0.22483536450000002 ZT4-7 0.09677077625 0.073996244 0.1195453085 ZT8-11 1.3305936007499999 0.283317097 2.3778701045 ZT12-15 4.781118153 3.9752404085000004 5.5869958975000005 ZT16-19 3.56865302 2.9534982554999996 4.183807784500001 ZT20-23 1.6870023095 1.405209418 1.968795201