condition mean min max ZT0-3 13.378116666666667 11.58605 15.514800000000001 ZT4-7 11.08915 11.08915 11.08915 ZT8-11 10.348315 10.348315 10.348315 ZT12-15 13.3977 13.08385 13.711549999999999 ZT16-19 13.71285 13.71285 13.71285 ZT20-23 16.9789 16.9789 16.9789