condition mean min max ZT0-3 24.725900000000003 20.280250000000002 27.426000000000002 ZT4-7 44.199799999999996 44.199799999999996 44.199799999999996 ZT8-11 37.22995 37.22995 37.22995 ZT12-15 38.650875 38.01265 39.2891 ZT16-19 37.06305 37.06305 37.06305 ZT20-23 30.04175 30.04175 30.04175