condition mean min max ZT0-3 0.6133937814999999 0.24117749300000002 0.9856100699999999 ZT4-7 4.086738871 2.290298633 5.883179109 ZT8-11 13.343132388499999 8.907460926999999 17.77880385 ZT12-15 19.8625537075 19.76401105 19.961096365 ZT16-19 19.405344310000004 19.093353290000003 19.71733533 ZT20-23 19.0992309075 18.791778869999998 19.406682945