condition mean min max ZT0-3 18.162037 18.162037 18.162037 ZT4-7 18.811244000000002 18.811244000000002 18.811244000000002 ZT8-11 16.811135 16.811135 16.811135 ZT12-15 25.795603 25.795603 25.795603 ZT16-19 36.086472 36.086472 36.086472 ZT20-23 125.9603115 125.9603115 125.9603115