condition mean min max ZT0-3 13.89095 13.89095 13.89095 ZT4-7 17.81005 17.81005 17.81005 ZT8-11 13.97485 13.97485 13.97485 ZT12-15 10.074449999999999 10.074449999999999 10.074449999999999 ZT16-19 12.7103 12.7103 12.7103 ZT20-23 13.847850000000001 13.847850000000001 13.847850000000001