condition mean min max ZT0-3 42.376833 42.376833 42.376833 ZT4-7 42.5866105 42.5866105 42.5866105 ZT8-11 32.725633 32.725633 32.725633 ZT12-15 39.013422500000004 39.013422500000004 39.013422500000004 ZT16-19 48.888509 48.888509 48.888509 ZT20-23 60.405651000000006 60.405651000000006 60.405651000000006