condition mean min max ZT0-3 441.90463075 376.07199720000006 507.7372643 ZT4-7 184.68718850000002 176.33649350000002 193.03788350000002 ZT8-11 185.257808425 165.12235325 205.39326359999998 ZT12-15 132.019982545 101.39802739000001 162.6419377 ZT16-19 63.5432991575 60.827558839999995 66.25903947500001 ZT20-23 57.448471102499994 54.134671 60.762271205