condition mean min max ZT0-3 1.04697312125 0.856907961 1.2370382814999998 ZT4-7 1.77763128225 1.570796685 1.9844658795 ZT8-11 4.03698684125 2.9713520730000003 5.1026216095 ZT12-15 4.400030537 3.7804312975 5.0196297765 ZT16-19 2.82926403575 2.5212895585 3.1372385130000002 ZT20-23 4.57622822575 3.9464084425 5.206048009