condition mean min max ZT0-3 3.73182 3.5492 3.91444 ZT4-7 4.174955 4.174955 4.174955 ZT8-11 3.593655 3.593655 3.593655 ZT12-15 0 0 0 ZT16-19 4.724625 4.724625 4.724625 ZT20-23 4.8781300000000005 4.8781300000000005 4.8781300000000005