condition mean min max ZT0-3 11.691680165000001 11.32054068 12.06281965 ZT4-7 12.0398724475 11.526811935000001 12.55293296 ZT8-11 11.137958855 10.518390105 11.757527605 ZT12-15 10.53557672 9.789853105 11.281300335 ZT16-19 13.061571632500002 11.969654935000001 14.15348833 ZT20-23 22.48268491 20.14271571 24.82265411