condition mean min max ZT0-3 45.678 45.678 45.678 ZT4-7 46.326449999999994 46.326449999999994 46.326449999999994 ZT8-11 35.30285 35.30285 35.30285 ZT12-15 33.7857 33.7857 33.7857 ZT16-19 37.11325 37.11325 37.11325 ZT20-23 38.0447 38.0447 38.0447