condition mean min max ZT0-3 0.012826716666666666 0.012580599999999999 0.013072833333333334 ZT4-7 0.039518000000000005 0.039518000000000005 0.039518000000000005 ZT8-11 0.0099471 0.0099471 0.0099471 ZT12-15 0.0 0.0 0.0 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0 0.0 0.0