condition mean min max ZT0-3 0.5360541666666667 0.0 0.814036 ZT4-7 0.0 0.0 0.0 ZT8-11 0.3530645 0.3530645 0.3530645 ZT12-15 1.2690394999999999 0.88867 1.649409 ZT16-19 1.94871 1.94871 1.94871 ZT20-23 1.466535 1.466535 1.466535