condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0.03500980775 0.0 0.0700196155 ZT16-19 0.048311331500000006 0.0 0.09662266300000001 ZT20-23 0.09463462574999999 0.08733775199999999 0.1019314995