condition mean min max ZT0-3 130.603148 130.603148 130.603148 ZT4-7 91.67004 91.67004 91.67004 ZT8-11 87.66460749999999 87.66460749999999 87.66460749999999 ZT12-15 60.671131 60.671131 60.671131 ZT16-19 28.685312 28.685312 28.685312 ZT20-23 18.256917 18.256917 18.256917