condition mean min max ZT0-3 75.734473 75.734473 75.734473 ZT4-7 139.8557005 139.8557005 139.8557005 ZT8-11 133.817875 133.817875 133.817875 ZT12-15 112.6488655 112.6488655 112.6488655 ZT16-19 103.356866 103.356866 103.356866 ZT20-23 112.28215599999999 112.28215599999999 112.28215599999999