condition mean min max ZT0-3 22.009700000000002 19.907400000000003 25.8948 ZT4-7 24.3659 24.3659 24.3659 ZT8-11 19.016 19.016 19.016 ZT12-15 17.438325 16.9025 17.97415 ZT16-19 19.950699999999998 19.950699999999998 19.950699999999998 ZT20-23 25.867600000000003 25.867600000000003 25.867600000000003