condition mean min max ZT0-3 26.1862 26.1862 26.1862 ZT4-7 19.40305 19.40305 19.40305 ZT8-11 27.0639 27.0639 27.0639 ZT12-15 24.817999999999998 24.817999999999998 24.817999999999998 ZT16-19 29.839199999999998 29.839199999999998 29.839199999999998 ZT20-23 21.6884 21.6884 21.6884