condition mean min max ZT0-3 0.15178205525 0.0 0.3035641105 ZT4-7 2.3042139765 2.2081473855 2.4002805675000003 ZT8-11 4.309185360000001 4.2642051080000005 4.354165612 ZT12-15 4.698157531 3.069364109 6.326950953 ZT16-19 4.013883842 2.680180818 5.347586866 ZT20-23 6.757504951 6.1678629715 7.3471469305