condition mean min max ZT0-3 14.009799999999998 12.7707 15.248899999999999 ZT4-7 12.71255 12.71255 12.71255 ZT8-11 23.88505 23.88505 23.88505 ZT12-15 0 0 0 ZT16-19 32.3857 32.3857 32.3857 ZT20-23 27.8072 27.8072 27.8072