condition mean min max ZT0-3 0.05216102625 0.0 0.1043220525 ZT4-7 0.38554222875 0.230284197 0.5408002605 ZT8-11 1.5822238445 1.035035361 2.129412328 ZT12-15 1.6870233639999999 1.333619909 2.040426819 ZT16-19 1.5191454985000001 1.2257904170000002 1.81250058 ZT20-23 2.115380888 1.9880331844999999 2.2427285914999997