condition mean min max ZT0-3 374.9013141575 101.06732841499999 648.7352999 ZT4-7 82.85298413 71.244185965 94.46178229499999 ZT8-11 67.74629245 64.673305075 70.819279825 ZT12-15 234.06629673499998 191.58334531999998 276.54924815 ZT16-19 376.08708735000005 374.60683455000003 377.56734015000006 ZT20-23 435.90909684999997 387.8378749 483.98031879999996