condition mean min max ZT0-3 729.693595 729.693595 729.693595 ZT4-7 676.23428 676.23428 676.23428 ZT8-11 824.5678355 824.5678355 824.5678355 ZT12-15 884.94838 884.94838 884.94838 ZT16-19 852.244672 852.244672 852.244672 ZT20-23 949.3239390000001 949.3239390000001 949.3239390000001