condition mean min max ZT0-3 13.74475 12.5768 14.7112 ZT4-7 11.26 11.26 11.26 ZT8-11 11.7595 11.7595 11.7595 ZT12-15 19.014875 17.4267 20.60305 ZT16-19 13.9583 13.9583 13.9583 ZT20-23 15.31465 15.31465 15.31465