condition mean min max ZT0-3 0.63367275 0.1616855 1.10566 ZT4-7 0.983143 0.983143 0.983143 ZT8-11 2.7517300000000002 2.7517300000000002 2.7517300000000002 ZT12-15 0 0 0 ZT16-19 1.431675 1.431675 1.431675 ZT20-23 4.1657399999999996 4.1657399999999996 4.1657399999999996