condition mean min max ZT0-3 0.41020199999999996 0.41020199999999996 0.41020199999999996 ZT4-7 0.7146064999999999 0.7146064999999999 0.7146064999999999 ZT8-11 0.49459450000000005 0.49459450000000005 0.49459450000000005 ZT12-15 0.1712595 0.1712595 0.1712595 ZT16-19 0.45465900000000004 0.45465900000000004 0.45465900000000004 ZT20-23 0.22471349999999998 0.22471349999999998 0.22471349999999998