condition mean min max ZT0-3 54.400202 54.400202 54.400202 ZT4-7 67.0405595 67.0405595 67.0405595 ZT8-11 56.874646 56.874646 56.874646 ZT12-15 56.463897 56.463897 56.463897 ZT16-19 66.3259285 66.3259285 66.3259285 ZT20-23 70.3012835 70.3012835 70.3012835