condition mean min max ZT0-3 0.6572635 0.4644135 0.9241995 ZT4-7 0.6595584999999999 0.6595584999999999 0.6595584999999999 ZT8-11 1.13202 1.13202 1.13202 ZT12-15 2.6882175 2.0302 3.346235 ZT16-19 1.665705 1.665705 1.665705 ZT20-23 1.63205 1.63205 1.63205