condition mean min max ZT0-3 0.03483895 0.03483895 0.03483895 ZT4-7 0.04555525 0.04555525 0.04555525 ZT8-11 6.4604e-05 6.4604e-05 6.4604e-05 ZT12-15 0.0 0.0 0.0 ZT16-19 0.0 0.0 0.0 ZT20-23 0.038593035000000005 0.038593035000000005 0.038593035000000005