condition mean min max ZT0-3 0.23994900000000002 0.0 0.47989800000000005 ZT4-7 0.3255995 0.3255995 0.3255995 ZT8-11 0.47878950000000003 0.47878950000000003 0.47878950000000003 ZT12-15 0 0 0 ZT16-19 0.4707605 0.4707605 0.4707605 ZT20-23 0.6307635 0.6307635 0.6307635