condition mean min max ZT0-3 16.06932996775 9.1537443155 22.98491562 ZT4-7 8.684158403249999 6.491617724499999 10.876699082 ZT8-11 17.23407487 14.131476674999998 20.336673065 ZT12-15 14.9920120625 13.234706835 16.74931729 ZT16-19 15.3393591975 14.811785154999999 15.866933240000002 ZT20-23 20.269391715 18.88729096 21.65149247