condition mean min max ZT0-3 30.503774999999997 30.4588 30.54875 ZT4-7 33.9182 33.9182 33.9182 ZT8-11 61.40105 61.40105 61.40105 ZT12-15 0 0 0 ZT16-19 56.620599999999996 56.620599999999996 56.620599999999996 ZT20-23 42.9148 42.9148 42.9148