condition mean min max ZT0-3 0.66907632325 0.376009005 0.9621436415 ZT4-7 4.871950555750001 3.210739611 6.5331615005 ZT8-11 13.39549496175 10.9568858885 15.834104035 ZT12-15 14.25624314675 12.0902567135 16.42222958 ZT16-19 16.14538914 13.287089915 19.003688365000002 ZT20-23 28.2332348725 25.470028185 30.99644156