condition mean min max ZT0-3 0.023618700000000003 0.0176205 0.03517855 ZT4-7 0.0 0.0 0.0 ZT8-11 0.03626115 0.03626115 0.03626115 ZT12-15 0.0188983 0.0 0.0377966 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0388626 0.0388626 0.0388626