condition mean min max ZT0-3 0.0386991265 0.029235728 0.048162525 ZT4-7 0.6065316575 0.243596914 0.969466401 ZT8-11 2.32389001475 1.9670100019999999 2.6807700275 ZT12-15 4.03563514475 3.3457758745 4.725494415 ZT16-19 3.240270151 3.0373517285 3.4431885735 ZT20-23 2.8499165645 2.2720293635 3.4278037655