condition mean min max ZT0-3 0.62385760375 0.19869546600000002 1.0490197415 ZT4-7 1.9485833752500001 1.5984709595 2.298695791 ZT8-11 2.11323049325 1.6845345409999999 2.5419264455 ZT12-15 1.54610352175 1.129801931 1.9624051125 ZT16-19 1.0215974984999998 0.911322478 1.1318725189999999 ZT20-23 1.37504203675 1.3142994190000001 1.4357846545