condition mean min max ZT0-3 1.3333584445 0.365360568 2.301356321 ZT4-7 0.080103683 0.0 0.160207366 ZT8-11 0.443120014 0.23784849449999998 0.6483915335 ZT12-15 0.7581254122500001 0.6881920625000001 0.8280587620000001 ZT16-19 0.542043927 0.5113366455 0.5727512085 ZT20-23 0.19414235225 0.0 0.3882847045