condition mean min max ZT0-3 96.69361 96.69361 96.69361 ZT4-7 46.72016 46.72016 46.72016 ZT8-11 46.849012 46.849012 46.849012 ZT12-15 70.674527 70.674527 70.674527 ZT16-19 226.20283 226.20283 226.20283 ZT20-23 374.631794 374.631794 374.631794