condition mean min max ZT0-3 22.5744 14.69655 30.45225 ZT4-7 22.47355 22.47355 22.47355 ZT8-11 14.799599999999998 14.799599999999998 14.799599999999998 ZT12-15 0 0 0 ZT16-19 46.71205 46.71205 46.71205 ZT20-23 14.3219 14.3219 14.3219