condition mean min max ZT0-3 0.3684311666666667 0.26212 0.5488900000000001 ZT4-7 0.9086780000000001 0.9086780000000001 0.9086780000000001 ZT8-11 1.32115 1.32115 1.32115 ZT12-15 0.7650572499999999 0.686414 0.8437005 ZT16-19 0.1259655 0.1259655 0.1259655 ZT20-23 0.4369825 0.4369825 0.4369825