condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.034508386999999995 0.0 0.06901677399999999 ZT8-11 0.17551994433333332 0.0 0.35103988866666663 ZT12-15 0.030613066999999997 0.0 0.061226133999999995 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0 0.0 0.0