condition mean min max ZT0-3 0.012148341666666666 0.011089133333333334 0.01320755 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0.0033236875 0.0 0.006647375 ZT16-19 0.0 0.0 0.0 ZT20-23 0 0 0