condition mean min max ZT0-3 0.73082154225 0.42813163299999996 1.0335114515 ZT4-7 1.69444039025 1.211607124 2.1772736565 ZT8-11 2.17050055125 1.9402365810000002 2.4007645215 ZT12-15 1.9615122335000001 1.9591908510000002 1.963833616 ZT16-19 2.365993869 1.9376313895 2.7943563485 ZT20-23 5.59863097775 4.49182158 6.7054403755