condition mean min max ZT0-3 25.73771 25.73771 25.73771 ZT4-7 43.888792 43.888792 43.888792 ZT8-11 47.311452 47.311452 47.311452 ZT12-15 50.4229955 50.4229955 50.4229955 ZT16-19 32.585242 32.585242 32.585242 ZT20-23 23.6480935 23.6480935 23.6480935