condition mean min max ZT0-3 22.879101097499998 22.681664415 23.07653778 ZT4-7 15.4856547975 15.258608245 15.71270135 ZT8-11 7.250586869249999 4.9617637125 9.539410025999999 ZT12-15 3.24838624725 2.5565215500000003 3.9402509445000002 ZT16-19 7.136435167 5.3993233069999995 8.873547027 ZT20-23 10.7741486955 10.331073151 11.21722424