condition mean min max ZT0-3 89.700985 89.700985 89.700985 ZT4-7 216.432356 216.432356 216.432356 ZT8-11 184.6612825 184.6612825 184.6612825 ZT12-15 109.02238650000001 109.02238650000001 109.02238650000001 ZT16-19 87.9412125 87.9412125 87.9412125 ZT20-23 105.7054325 105.7054325 105.7054325