condition mean min max ZT0-3 31.156599999999997 28.5997 33.713499999999996 ZT4-7 67.60255 67.60255 67.60255 ZT8-11 78.52165 78.52165 78.52165 ZT12-15 0 0 0 ZT16-19 13.01885 13.01885 13.01885 ZT20-23 37.84225 37.84225 37.84225