condition mean min max ZT0-3 49.118355835 40.449548549999996 57.78716312 ZT4-7 19.604534125 18.829385369999997 20.37968288 ZT8-11 25.6886234825 22.36697537 29.010271595000003 ZT12-15 22.79429379 19.95961597 25.62897161 ZT16-19 22.0781415875 20.474670449999998 23.681612725 ZT20-23 29.2306903825 29.055275430000002 29.406105335