condition mean min max ZT0-3 1.4740631080000002 0.6338912879999999 2.3142349280000003 ZT4-7 4.78247404875 3.130531362 6.4344167355 ZT8-11 4.929313671999999 4.7015688524999995 5.1570584915 ZT12-15 16.0198462175 8.01650796 24.023184475 ZT16-19 56.9996038675 45.42445626 68.574751475 ZT20-23 43.208509235 26.854066680000003 59.56295179