condition mean min max ZT0-3 0.109502 0.108174 0.11083 ZT4-7 0.2747635 0.2747635 0.2747635 ZT8-11 0.5532995 0.5532995 0.5532995 ZT12-15 0 0 0 ZT16-19 0.7083945 0.7083945 0.7083945 ZT20-23 0.4935125 0.4935125 0.4935125