condition mean min max ZT0-3 37.868423897499994 31.859770984999997 43.87707681 ZT4-7 9.618273239 8.3533217735 10.883224704500002 ZT8-11 6.742838957 6.6078181444999995 6.8778597695 ZT12-15 23.51705653775 20.4844994805 26.549613595 ZT16-19 38.43163846 38.080499875 38.782777045 ZT20-23 36.932177425 33.15018223 40.71417262