condition mean min max ZT0-3 44.0273 44.0273 44.0273 ZT4-7 29.435200000000002 29.435200000000002 29.435200000000002 ZT8-11 29.3937 29.3937 29.3937 ZT12-15 39.12875 39.12875 39.12875 ZT16-19 51.110749999999996 51.110749999999996 51.110749999999996 ZT20-23 55.6166 55.6166 55.6166