condition mean min max ZT0-3 63.1529933375 55.846016765 70.45996991 ZT4-7 30.9434419625 30.914642475 30.97224145 ZT8-11 35.583854295 30.64207524 40.52563335 ZT12-15 25.3953004275 21.345910855 29.44469 ZT16-19 28.691353777499998 26.87505531 30.507652245 ZT20-23 36.6740862675 34.602418885 38.74575365