condition mean min max ZT0-3 0.7885115 0.561366 0.9485855 ZT4-7 0.649918 0.649918 0.649918 ZT8-11 0.690914 0.690914 0.690914 ZT12-15 1.448165 1.367435 1.528895 ZT16-19 1.40034 1.40034 1.40034 ZT20-23 1.2485650000000001 1.2485650000000001 1.2485650000000001