condition mean min max ZT0-3 553.81953055 472.41918599999997 635.2198751 ZT4-7 296.02180577499996 248.28703330000002 343.75657824999996 ZT8-11 249.84698155 220.2628468 279.4311163 ZT12-15 120.53835999 112.601177895 128.475542085 ZT16-19 188.74258559999998 164.84437110000002 212.64080009999998 ZT20-23 308.9855493 296.2772182 321.6938804