condition mean min max ZT0-3 30.311283333333336 23.64025 36.049800000000005 ZT4-7 23.6125 23.6125 23.6125 ZT8-11 28.8979 28.8979 28.8979 ZT12-15 38.342 36.011700000000005 40.6723 ZT16-19 42.5274 42.5274 42.5274 ZT20-23 50.830200000000005 50.830200000000005 50.830200000000005