condition mean min max ZT0-3 9.88656 9.88656 9.88656 ZT4-7 7.441694999999999 7.441694999999999 7.441694999999999 ZT8-11 7.71699 7.71699 7.71699 ZT12-15 9.608825 9.608825 9.608825 ZT16-19 12.383099999999999 12.383099999999999 12.383099999999999 ZT20-23 10.35885 10.35885 10.35885