condition mean min max ZT0-3 63.802848585 40.64627894 86.95941823 ZT4-7 72.7742472325 70.275832855 75.27266161 ZT8-11 179.1033056675 121.88150313499999 236.3251082 ZT12-15 368.474007825 335.63823095 401.3097847 ZT16-19 255.660775675 255.10356344999997 256.2179879 ZT20-23 271.182097125 267.2062049 275.15798935