condition mean min max ZT0-3 0.53043400625 0.443278127 0.6175898855 ZT4-7 1.293049157 0.9902426565 1.5958556575 ZT8-11 1.65525918725 1.6188621255 1.691656249 ZT12-15 1.46620679 1.405568073 1.526845507 ZT16-19 1.531014598 1.1368404045 1.9251887915 ZT20-23 3.31277737975 2.7773694315000004 3.848185328