condition mean min max ZT0-3 5.2323900000000005 5.2323900000000005 5.2323900000000005 ZT4-7 4.44595 4.44595 4.44595 ZT8-11 5.2366150000000005 5.2366150000000005 5.2366150000000005 ZT12-15 4.28831 4.28831 4.28831 ZT16-19 7.099175 7.099175 7.099175 ZT20-23 5.81057 5.81057 5.81057