condition mean min max ZT0-3 1.69583944475 0.9200991070000001 2.4715797825 ZT4-7 12.11256082825 6.6353236765000005 17.58979798 ZT8-11 24.17928746 21.673165660000002 26.68540926 ZT12-15 13.833203312000002 9.274430086 18.391976538 ZT16-19 5.18628388875 4.3208811295 6.0516866480000004 ZT20-23 2.7214763272499995 2.3940362769999997 3.0489163775