condition mean min max ZT0-3 5.7065175 5.568795 5.84424 ZT4-7 5.602695 5.602695 5.602695 ZT8-11 5.848925 5.848925 5.848925 ZT12-15 0 0 0 ZT16-19 8.29019 8.29019 8.29019 ZT20-23 5.86919 5.86919 5.86919