condition mean min max ZT0-3 0.015285621666666666 0.014991237 0.015580006333333334 ZT4-7 0.008627096833333332 0.0 0.017254193666666664 ZT8-11 0.0199618155 0.0 0.039923631 ZT12-15 0.033532061499999995 0.0 0.06706412299999999 ZT16-19 0.0074762890000000005 0.0 0.014952578000000001 ZT20-23 0.0 0.0 0.0