condition mean min max ZT0-3 29.2443 29.2443 29.2443 ZT4-7 22.4692 22.4692 22.4692 ZT8-11 17.526899999999998 17.526899999999998 17.526899999999998 ZT12-15 21.52885 21.52885 21.52885 ZT16-19 26.2001 26.2001 26.2001 ZT20-23 27.5843 27.5843 27.5843