condition mean min max ZT0-3 135.983432775 110.48475790000002 161.48210765 ZT4-7 104.09008051250001 90.8778895 117.30227152500001 ZT8-11 97.32358576249999 90.63016884999999 104.01700267499999 ZT12-15 50.2921935225 37.877476195 62.70691085 ZT16-19 35.6511430725 33.479138815 37.82314733 ZT20-23 30.627626655 26.42185589 34.83339742