condition mean min max ZT0-3 0.4766415 0.472284 0.480999 ZT4-7 0.740846 0.740846 0.740846 ZT8-11 1.090477 1.090477 1.090477 ZT12-15 0 0 0 ZT16-19 1.160273 1.160273 1.160273 ZT20-23 0.863016 0.863016 0.863016