condition mean min max ZT0-3 145.002541815 55.82904296 234.17604067000002 ZT4-7 326.32972055 296.46123379999995 356.19820730000004 ZT8-11 123.58042417250002 74.85025118 172.31059716500002 ZT12-15 13.675798042250001 11.1699484265 16.181647658000003 ZT16-19 36.40736779 32.098355170000005 40.71638041 ZT20-23 30.367988984999997 21.59147311 39.14450486