condition mean min max ZT0-3 2.695975e-05 2.695975e-05 2.695975e-05 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0.0 0.0 0.0 ZT16-19 6.025e-06 6.025e-06 6.025e-06 ZT20-23 0.016980513833333332 0.016980513833333332 0.016980513833333332