condition mean min max ZT0-3 10.666599999999999 10.666599999999999 10.666599999999999 ZT4-7 8.418765 8.418765 8.418765 ZT8-11 5.67506 5.67506 5.67506 ZT12-15 7.14916 7.14916 7.14916 ZT16-19 7.46101 7.46101 7.46101 ZT20-23 9.450344999999999 9.450344999999999 9.450344999999999