condition mean min max ZT0-3 19.409851 19.409851 19.409851 ZT4-7 102.2651795 102.2651795 102.2651795 ZT8-11 145.3170895 145.3170895 145.3170895 ZT12-15 75.454625 75.454625 75.454625 ZT16-19 205.686961 205.686961 205.686961 ZT20-23 176.8093965 176.8093965 176.8093965