condition mean min max ZT0-3 37.330109 37.330109 37.330109 ZT4-7 44.265459500000006 44.265459500000006 44.265459500000006 ZT8-11 29.162301499999998 29.162301499999998 29.162301499999998 ZT12-15 42.608616 42.608616 42.608616 ZT16-19 42.1545175 42.1545175 42.1545175 ZT20-23 36.109325 36.109325 36.109325