condition mean min max ZT0-3 11.87937 11.87937 11.87937 ZT4-7 12.052219000000001 12.052219000000001 12.052219000000001 ZT8-11 11.634926499999999 11.634926499999999 11.634926499999999 ZT12-15 12.730592000000001 12.730592000000001 12.730592000000001 ZT16-19 11.275658 11.275658 11.275658 ZT20-23 10.750448500000001 10.750448500000001 10.750448500000001