condition mean min max ZT0-3 13597.55 13597.55 13597.55 ZT4-7 13449.2 13449.2 13449.2 ZT8-11 13874.9 13874.9 13874.9 ZT12-15 11952.5 11952.5 11952.5 ZT16-19 15418.550000000001 15418.550000000001 15418.550000000001 ZT20-23 14843.099999999999 14843.099999999999 14843.099999999999