condition mean min max ZT0-3 16.438330873250003 7.6377629865 25.23889876 ZT4-7 9.283033138499999 4.738069318999999 13.827996958 ZT8-11 67.25626703500001 43.410662370000004 91.1018717 ZT12-15 69.9443255025 54.320246245 85.56840476 ZT16-19 25.4533087075 22.111657025 28.79496039 ZT20-23 11.895318017000001 10.230888784 13.559747250000001