condition mean min max ZT0-3 43.903400000000005 43.903400000000005 43.903400000000005 ZT4-7 30.26825 30.26825 30.26825 ZT8-11 27.325 27.325 27.325 ZT12-15 31.81125 31.81125 31.81125 ZT16-19 44.22865 44.22865 44.22865 ZT20-23 42.835 42.835 42.835