condition mean min max ZT0-3 4.04059 4.04059 4.04059 ZT4-7 6.169784999999999 6.169784999999999 6.169784999999999 ZT8-11 5.7951999999999995 5.7951999999999995 5.7951999999999995 ZT12-15 3.9733349999999996 3.9733349999999996 3.9733349999999996 ZT16-19 5.93299 5.93299 5.93299 ZT20-23 7.867586666666667 7.867586666666667 7.867586666666667