condition mean min max ZT0-3 56.561152478333334 37.39306813 75.72923682666666 ZT4-7 50.439422500000006 45.512941770000005 55.36590323 ZT8-11 53.24259474 42.99362116 63.49156832 ZT12-15 45.05632431833334 36.02118978666667 54.09145885 ZT16-19 67.25336436 59.708356163333335 74.79837255666666 ZT20-23 66.17061995833333 61.96118664333333 70.38005327333333