condition mean min max ZT0-3 1.0093235 1.0093235 1.0093235 ZT4-7 0.36636250000000004 0.36636250000000004 0.36636250000000004 ZT8-11 0.46899199999999996 0.46899199999999996 0.46899199999999996 ZT12-15 0.675005 0.675005 0.675005 ZT16-19 1.896175 1.896175 1.896175 ZT20-23 1.63252 1.63252 1.63252