condition mean min max ZT0-3 0.017795833333333334 0.0 0.0533875 ZT4-7 0.0542455 0.0542455 0.0542455 ZT8-11 0.055135 0.055135 0.055135 ZT12-15 0.0 0.0 0.0 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0 0.0 0.0