condition mean min max ZT0-3 0.75696115875 0.52018675 0.9937355675000001 ZT4-7 2.1454885635 1.8190467615 2.4719303655 ZT8-11 1.98681833325 1.6714930954999998 2.302143571 ZT12-15 6.79406938075 5.4808993995 8.107239362 ZT16-19 10.9140946885 9.785294247 12.042895130000002 ZT20-23 11.705440389749999 10.1976034145 13.213277365