condition mean min max ZT0-3 19.2849 19.2849 19.2849 ZT4-7 13.63275 13.63275 13.63275 ZT8-11 11.6391 11.6391 11.6391 ZT12-15 10.0012 10.0012 10.0012 ZT16-19 19.5141 19.5141 19.5141 ZT20-23 19.05675 19.05675 19.05675